I'd like to see the IS-2 have it's damage increased 200 if not 240. It feels like the cannon doesn't reflect the original design or a distinct soviet style heavy tank. It just feels like a worse tiger.
I think the tiger is itself good when it hits veterancy 2 it's got good range and rate of fire and can bully medium tanks and push up and kill lone or wounded tank destroyers. More importantly it's got a lot of very good commanders supporting it. I don't think it needs any changes.
I would much rather the pershing be like the king tiger unlockable onece all other tech is complete. The US doesn't have armor that can take much damage and being limited to one commander really limits the tanks ability. Echelons are also awful for repairs even with the damage reduction buff it still takes an insufferable amount of time to fix the unit without other vehicle crews helping out. For the unit itself I'd just really like to see the damage reduction undone. Health increased back to 960 and the vehicle crew repair from elite armor and the tiger ace be given to the pershing.
I would like to see the comet and churchill normally be available to the british but hammer and anvil both bring additional buffs and when combined would likely make brit late game possibly too strong.
I think the King tiger is perfect. By being baked into faction design it always allows a commander choice and is always an option to work towards. It's very heavily armored and armed but very limited in it's mobility giving it an easily understandable role and counters.
For IS2 and tiger damage,IS2 reload too slow and German have Panther and some high HP tank,240 damage will more dangerous for those.
Tiger shot faster than IS2,and Allied most tank is 640 HP,destroy them still need 4 shot,but kill most light armor with 2 shot not 3，kill Allied Heavy or High rank medium tank like 34/85 or Churchill will less 1 or 2 shot,I think it will make them different position for different factions.