If you want balanced game then make custom game with only one model of tank allowed. Historically KV-1 was OP as f... and so should be in the game... Fact is historically it never fought the tanks it's fighting in game. It fought for the first time in 1939 and was retired in 1943. Go figure what it should be fighting. Balancing the game should be done with number of tanks and number of respawns, not with BRs.
As a history nerd, it pains me to see the no no german symbol being out of scale. It should be at least a size smaller. I think this skin most likely referenced the Smithsonian ta152h0 which has a symbol painted on by American evaluators post-war.
This is why im never going to grind nato vehicles (aka everything except russian ), i just enjoy playing versus people who depend on buffed and owerpowered stuff