I dont see reason to some of them, they had negative points too
Conqueror: Stay at 7.7 due to its long reload, poor mobility, cant depression its gun like the other british tanks, it go only 6°, its armor isnt crazy tho, its strongest point in the hull is just 120mm angled, its a T-54 with less angle basically, the turret is strong but can be easily damaged by heat (cuz gaijin cant model the spaceds correctly) also the mantelet is very weak, the turret ring is big enough and everything can go threw, the commander hatch is big and can be penned too that and the lack of 10° of gun depression dont let it be a hulldown king
KV-220: Stay at its BR, You forgot it has 100mm all around ye? It would be an absolute nuclear bomb vs a bunch of coughin babies. The strongest (i think) tank in 5.7 is the Commander version of the Porsche Tiger that has 200mm UFP, but only that still a tank with huge weakspots and arent that friendly agains errors if youre fighting lightly skilled players, the 220 had 100mm even in the butt and most of tanks cant even pen it, imagine this going against 4.7 💀
Panthers: Stay at its BR, 6.3 for Panthers? Theres no significant upgrade on them to get this high in BR, they are in 6.0 for a reason, Weak Armor (even if angled but it fights things that can easily break them apart), its huge, its transverses are bad, its gun elevation speeds are bad, also their gun isnt something crazy, they are in a good spot, the Panther F is the worst due to its flat turret front even with some extra milimeters of armor, everything go thrw and you can only angle a little and hope it hits the mantelet, or just become a free kill
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My Proposals: some tanks arent there so at my opinion playing or going against them
AMX M4: 7.0 > 6.7, it was 6.7 but for some reason it get up to 7.0 while T34 and Tiger II(H) still in 6.7, due to autoloader? That doesnt matter, its still had only solid AP, its armor is the same as a Panther (80mm front), big sillouette and also it takes a while to reload the drum, yeah its fast and had a good transverse but this is due to its light turret armor and light side armor too, this tank isnt that heavy and its nemesis are heavy tanks with actual armor
Chieftain Mk.10: 9.3 > 9.0, it was 9.0 just months ago but for some reason gaijin just throw it up, i dont see this tank broken anywhere, yes it got a laser rangefinder and APFSDS, but its mobility is poor, its transverse is poor, its engine is weak, the tank is huge asf, also the only armored part of this tank is the extra turret armor that had huge holes on it everything go thrw, even the Chief 900 going up is kinda meh since it dont even had the extra turret armor and its engine is just slightly better but in reality its not so different from the Mk10, its just the same tank in pratice with less armor and just little (very little) more acceleration, also in the same BR (9.3) we had the Al-Khalid that is a Jordan Chieftian with a really good engine that can difference itself from other chieftains, but its right in its BR.
Char 25t: 8.0 > 7.7, it get to 8.0 a long time ago, people nowdays are more skilled (i think) this thing only has a 90mm with M82 from 6.7 (even some 5.7 had this shell) isnt crazy, but it becomes “”" Good “”" due to its 4 sec autoloader, but having that doenst make the tank automatically good, the french players are skilled players but this tank isnt made for 8.0 mid CW MBTs, its a 7.7 tank from autoloader frenchies that should fight Post-ww2/early Cold war veichles not modern veichles it clarely goes against