The russians and their tanks

Yeah, I'm rolling the Russians, so far I have KV-2, and IS-1 as my most advanced tanks.. Only drawback of russian tanks is their terrible gun depression that I encountered so far.. are there any more flaws later on? And Are they really that good on higher tiers?

IS 3 and Is 4 are almost to imposible to kill from a front T 54-s are great but still all Russian tanks have terrible gun depression