Proposed Battle rating changes for ground:
Working list
USA:
T92 7.0 > 7.3 (Tends to bounce or eat shells, fast, small, very easy to bush and hide, potent HEATFS)
T26E5 6.7 > 7.0 (7.3 quality armor at 6.7, with a good reload and good penetration being better than most 6.7s with ease)
T34 6.7 > 7.0 (spreading out the heavy tanks, getting better rewards, but good gun / armor. Able to pierce anything, while blocking many hits. 5.7s can hardly kill it, same as T26E5)
T30 6.7 > 7.0 (better T34 at the same BR, with a larger cannon, good pen, insane HE filler, able to overpressure many tanks easily.)
M551(76) 7.0 > 7.3 (stabilized very potent light tank, with a decent damage APDS, than can kill every 6.7-7.3 frontally with ease).
T29 7.0 > 7.3 (A go to, to bully tanks, great from 6.0 - 7.7, most 6.0-6.3 tanks hardly can kill these T34, T30 included, good reload and great penetration with APHE).
M50 6.7 > 7.3 (small size, quiet engine, ability to rapid fire 6 rounds, very easy to bush up).
Germany:
VK30.02 5.0 > 5.3 (should never have been able to see 4.0 tanks no matter how bad its turret traverse is. Also way too powerful of a gun for 4.0-4.7 with armor to match).
Panther D 5.3 > 5.7 (makes sense as a step up from the VK being 5.3, while having better armor).
2 Tiger pack OST/west 5.7 > 6.0 (preforming well, add on armor drastically increases survivability, with a good cannon).
Tiger II (H)s 6.7 > 7.0 (USA heavy dispersion happening, thus Germany gets it too, and the Tiger II is equal to the T34, and T30 in terms of performance).
Tiger II 10.5 CM 7.0 > 7.3 (devastatingly good gun, with a harder to hit turret face, due to bigger cannon breech)
Luchs 7.3 > 7.7 (better Wiesel but bigger with a 360 degree turret rotation.)
Pzh2000 7.7 > 8.0 (even with no thermal, by far the best arty in game with a 5.0 sec auto loader for the first 4 rounds, subsequent loads are 7.5 secs )
Df105 8.0 > 8.3 (10 shot HEAT mag, with a 5 sec load time, can bounce early APFSDS, and eats auto cannon rounds).
Raketenautomat 8.0 > 8.3 (massive magazine of devastating ammo, with great pen and low drop).
Gepard 8.3 > 9.0 (often used to zoom to a flank and wipe half a team due to great APHE, and it’s APDS can kill the heaviest of tanks, also way too good of an aa for just 8.3, it can easily down helicopters, and planes with ease).
Turm III 8.3 > 8.7 (very powerful medium tank with a 5.0 sec reload and auto cannon, and great gun depression, often it’s so open it will be hit with little to no damage).
Begleitpanzer 57 9.3 > 9.7 or 10.0 (pretty much a IRST lock-less 2s38, being faster and better armored at a whole br lower. This can often reduce all enemy CAS like it didn’t exist, especially helicopters, which makes it surprisingly under br’d still. The TOW is usable for long range hits, or as a back up weapon.)
Russia:
KV-1(Zis-5) 4.7 > 4.3 (the Sweden one is 4.7 with a far better turret and same gun, making little sense why they are identical in BR placement.)
IS-3 7.3 > 7.0 (terrible reload, somewhat slow, bad gun depression, terrible performance, terrible shell unable to deal with many things at 8.3, 8.0, or 7.7, can deal with some 7.3s, heavies are a bit of a problem though).
IS-6 7.7 > 7.3 (terrible reload, bad gun depression, gunner optics are a big weak point aams as roof hatches, bad penetration, not equal to other 7.7s in performance, being typically equal to or slightly better than the IS-3, not enough to warrant a br difference).
T-54 (1947) 7.7 > 7.3 (absolutely terrible vehicle, other than armor, gun handling sucks, shell is okay, turret traverse is like a panther D. The cons make fighting vehicles with HEAT-FS a living hell, as your armor was made to stop AP, APHE, etc).
T-54 (1949) 8.0 > 7.7 (same as above)
Shturm-S 8.7 > 9.0 (good multi role, and IT-1 is the same Br, being higher br would fit into a good line up, causing less one death leaving, while providing better rewards).
2s25 9.3 > 9.7 (speedy with a good gun, lacking thermals and survivability, spreads out the vehicles).
Krizantema-S 9.7 > 10.0 (ability to use radar to detect tanks, mostly sees 10.3 / 10.7 matches anyways. Has 2 good ATGMs, and gen 3 thermals. Lacks good survivability)
T-72B 10.3 > 10.0 (pretty much a T-72A but at a br where everyone fires APFSDS, absolutely terrible to play when you can’t rely on a single part of your tank like: speed, reload, armor. The only good thing is the gun).
T-90A 11.0 > 10.7 (Good armor if facing 11.3s or lower, difficult to play above that. Long 7.1 sec reload and poor speed overall, terrible turret traverse, and a APS that doesn’t work vs vehicles you face).
All T-80U, UM2, UE, UK, UD, BVM (T80U or newer) reload corrected to 6.0 seconds. (Historically accurate, cyclogram data literally even says 6.0 seconds.)
Britain:
Fox 7.7 > 8.0 (insane mobility and lethality, able to cross an entire map in the span of 15-25 seconds, with a gun that can kill most tanks).
Conquerer 7.7 > 8.0 (excellent armor and gun)
ZA35 8.3 > 8.7 (faster gepard meaning quicker easier flanks).
Japan:
Heavy tank no.6 6.0 > 5.7 (lacking add on armor, and smoke launchers, which are useless, block gun depression).
ST-A3 6.7 > 7.0 (great penetration, all around a good tank, but poor armor).
Type 61 6.7 > 7.0 (6.0 sec auto loader is too good for manually loaded tanks around).
Ho-Ri prototype 6.7 > 7.0 (extremely good armor for a 6.7, decent reload, good speed, and devastating cannon).
Type 60 SPRG 6.7 > 7.0 (rattier M56, easier to hide as well, as being .50 cal proof).
Type 99 7.3 > 7.7 (auto loaded arty with the biggest amount of HE filler in its shell, should’ve never been able to see 6.3s).
Ho-Ri production 7.3 > 7.7 (a better Ho Ri prototype, being able to bounce / take absurd amounts of damage rivaling the maus. Very good mobility, and a very good gun).
China:
Object 122MT 8.7 > 9.0 (a far better T-62, boasting better armor, with enhanced mobility, and the ability to fire 4 ATGMs rapidly along side its main gun).
AFT09 9.0 > 9.3 (can launch 4 ATGMs in rapid succession and is decently fast).
Italy:
Pzh2000Hu 7.7 > 8.0 (same reason as German one)
Sidam 25 8.3 > 8.0 (absolutely terrible aa, worse than ZSU-23-4, Gepard, M163, etc).
Dardo 10.0 > 9.7 (fast firing auto cannon, but worse protection than the Bradley, very poor atgm storage leading to being hit in empty space and detonating. No IRST lock, very poor survivability, this and the Vcc80/30 are the same br. Moving this to 9.7 gives a decent 9.7 lineup for Italy).
KF41 11.0 > 10.7 (has an APS but is a worse puma in survivability)
Aubl 74 / HVG reload buff 6.0 secs > 3.5 secs (only logical If 120mm cannons can reload in 5.0 seconds, it doesn’t make sense how / why a 60mm cannon loads in 6.0 seconds. Lending itself to being one of the worst reloads for one of the worst cannons in the game).
M300 spall damage increased by 16% (this would help out both the Vcc80/60 and justify its 9.3 br change, and also help out the Aubl 74/ HVG)
France:
AMX 50 (TO/90) 8.0 > 7.7 (being slightly faster, with less armor and penetration than the somua, with a APHE round, it never made sense to move this to 8.0 after its battlepass ended, as 8.0 and up it struggles to fight a lot of vehicles if they’re stabilized, well armored, etc.)
Somua SM 7.7>8.0 (can go 3v1 easily in downtier, with a skinny gun, and all around being a jack of all trades with good pen.)
M4 (FL10) 5.0 > 5.3 (better than most Sherman’s, while having a 10 round magazine and a 5.0 sec load time, make this a nasty tank to encounter).
Sweden:
Bkan 6.7 > 7.0 (fast firing gun, Proxy)
U-SH 405 8.0 > 8.3 (a much faster and quieter rakentenautomat).
Pbv 501 6.7 > 7.3 (should never be a BMP-1 below 7.3 regardless of not having an atgm, as the main gun is quite good.)
T-54 8.0 > 7.7 (same reason as Soviet one)
Pbv 302 (Bill) 8.7 > 8.3 (these atgm launcher systems are absolutely terrible to play / spade. It’d be easier to eat one’s own hands).
Itpsv Leopard 8.7 > 9.3 (being a better, and better armored Gepard, it’s strange it’s only been one br higher. 9.3 is a good fit for it though.)
Amended / added ones will be underlined.