There are many great vehicles that have been given good Battle Ratings such as the Jumbo sherman, But players heavily struggle when getting uptiered to 7.3 where every tank outclasses the jumbo. This is a big problem because WW2 vehicles with weak guns and good armor get uptiered to those with guns where armor doesn’t even matter.
A good mechanic to add to the game is that some vehicles are locked to their BR, basically removing uptiers for certain vehicles.
Or by introducing a new game mode that is more balanced, such that shermans fight tiger 1’s, VK3002’s, and other tanks which have similar performance.
Basically, Surbaisse, Somua’s, Centurions, fight nations/vehicles perspective to WW2.
Or by simply solving all problems and making uptiers and downtiers as little as 0.3 BR.