Critique:
M64
While the M18 got buffed with its engine power and its mobility is a bit better, these can go up, but the M64 did not receive such a change and thus has no advantage over the M18 while just being slightly more cumbersome as a vehicle.
Super Hellcat
Heavier than the M18 and with no major advantage other than that the gun that makes up for the increase in BR. A single BR step above the M18 as a less mobile but with more firepower platform is not unrealistic.
Otherwise some decent changes!
Suggestions, Air RB:
F-86F-40 (all)
9.0 → 8.7
Just like the MiG-15s, MiG-17s and other Sabre variants going down, these variants should not be forgotten. Their only advantages over other sabre variants would be their two mediocre missiles. Being at the same BR as the CL-13B Mk.6 is not really fair.
Hunter F.1, J34
9.0 → 8.7
These should also not be forgotten about. They are very lacklustre at their BR at the moment and would do well to follow their contemporaries down in BR.
P-51H-5-NA
6.3 → 6.7 or even 7.0
Again, as with every BR changes post, this one should - for once - be up-BR’d to 6.7. It is absolutely broken at its BR and has been for a long time now. Hell, even 7.0 would do.
MiG-19S, MiG-19PT
9.3 → 9.7
Untouchable in a downtier, but does not do well as most aircraft are much too manoeuvrable for it. Playing it is tedious and difficult due to enemies (that you set up for a kill) die to your teammates anyway. At 9.7 it can face enemies that it doesn’t entirely eclipse in performance.
F-104A/C
9.3 → 9.7
As with the MiG-19s, these are simply too tedious to face to warrant them being in this BR bracket. Every game that and F-104A/C is in it ruins the lobby by running forever as they can NEVER win a game against anything unless the pilot knows exactly what they are doing and the enemy is clueless. Please, they do not belong fighting subsonics that go half their top speed.
M.D.452 IIC
8.3 → 8.0
No significant advantage over the IIA other than the guns and slight engine difference. With the other 8.3, 8.7 and 9.0s going down, this thing would deserve a lower BR too.
Mystere IVA
8.7 → 8.3
Same as the M.D.452 IIC, a lower BR is deserved.
Super Mystere B2
This thing has none of the advantages the Israeli variants have, and thus deserves a lower BR, similarly to the other two french jets mentioned.
F-4EJ Phantom II, ADTW
11.0 → 10.7
Absolutely the worst Phantom in the game for its BR. Slatless wings make it terrible in a dogfight with anything that the F-4E could otherwise deal with.
Ki-84 hei
6.3 → 6.0 or even 5.7
Why in gods name is this thing so high in BR? It is just a Ki-84 otsu that trades 2 20mms for 2 30mms? Sure, the improved firepower is nice, but it really does not offer anything significant other than less time required on target.
J2M4 Kai
5.0 → 4.7
This thing is a boat. Rework its FM or reduce its BR please. Unflyable garbage.
A6M5 ko, A6M5 otsu
5.3 → 5.0
Why are these things 5.3?? They can turn better than anything else, sure, but that is their ONLY advantage. All other aircraft (with competent pilots) simply go up and the Zero cannot follow.
A6M5, A6M6c, A6M3 mod.22 ko
Again, ridiculous BRs simply due to the lack of skill from enemy pilots who cannot understand the enemy advantage and deal with their disadvantages.
F3H-2 Demon
9.3 → 9.0
An absolute boat. Show this turd some love, please. It is very pathetic at its current BR.
FJ-4B (all), A-4B
8.7 → 8.3
As with the other 8.7s going down, these should be no different. Especially since the A-4B is simply a worse A-4E at the same BR.
G.91 YS
9.7 → 9.3
This thing has NOTHING going for it except using Aim-9Bs instead of Nord AAs (which are arguably better) compared to the standard G.91 Y. No reason to warrant a higher BR.
G.91 R/1
8.7 → 8.3
Worst G.91 comparatively. Has only disadvantages compared to the German TT and the R/4s that have better missiles (and more of them) or better guns. Should go down with the rest of the 8.7s.
G.91 pre-serie
8.3 → 8.0
Should also go down as a result of the 8.3s going down.
F-105D
10.0 → 9.7
If used as a fighter, it is no better than an F-104A. Lacks flares, so could easily sit at the same BR as the T-2 while not bothering anyone.
S.O.8000 Narval
5.7 → 5.3
This thing is very, very sad. The only thing it has going for it is firepower, and due to this it is not very effective. Hunting bombers cannot be the sole strategy of this thing as head-ons just leave you crippled even if you survive. An absolute boat in terms of performance that is worse than even the P-38L at 4.7 - a whole BR below.
P-39N-0, P-39Q-5
2.7 → 3.0
These things simply bully everything, especially in downtiers. You cannot allow 1.7s to fight these monsters.
Wyvern
4.3 → 4.7 or even 5.0
One of the biggest mistakes ever was lowering this monsters BR, and more than once too. There is nothing in the game within its BR range that comes close to its performance. Nothing can catch it, even slightly, if it decides to run. Absolute terror.
Overall change with top tier
Raise BR to 13.0, up everything above ~12.0 a BR step up
→ If this is done, also raise the particularly good 11.7s to fill the 12.0 BR. These are (in my opinion):
F-14A, J-8F, JH-7A, Mirage 2000C-S5/S4
This change would make everyone happy (except those that only abuse the top tier aircraft) and would do well to decompress top tier.
Suggestions, Ground RB:
BMP-2M
10.0 → 10.3
I will never be happy with 4 fire-on-the-move tandem ATGMs at 10.0. These need to never see non-composite vehicles that it can at times pen frontally even with its autocannon. It is absolutely devastating.
Object 292
10.0 → 10.3
Essentially a T-80B with a longer reload for a much, much better round and lacking in some armour and a machine gun. The trade-off is fine, and it should sit with the T-80B at the same BR.
2S25, 2S25M
9.3 → 9.7, 10.0 → 10.3
Incredible firepower and mobility at a very unfair BR. These things have their niches that are filled well despite a nerf in BR.
Khrizantema
9.7 → 10.0
On some maps, this thing is untouchable. That is something that no BR nerf can do anything about, but it absolutely bully non-composite vehicles and it belongs at a higher BR where the playstyle is more acceptable.
XM-1
9.3 → 9.0 OR give it a better round
This thing was nerfed for some reason and now struggles to pen T-72s frontally unless aiming very well. It’s high mobility can no longer be its crutch as a single non-pen is a death sentence. I am not advocating really for a lower BR, but a better or re-buffed round is all I’m asking for.