I'm saying doctrines should not have things that are all super effective. Everything should just be good enough that other doctrines are viable.
As far as the KV-2 goes, it is now a formidable threat that cannot be easily dealt with for the Axis. Axis don't have mark target in multiple commanders, and the only mark target they do have is a weaker variant and on a unit rather than the commander.
There will always be super-effective doctrines, even if you nerf all top meta commanders people will just find next most viable and settle for using that next.
Making KV-2 into formidable threat like IS-2 or ISU is exactly what revamp patch is doing right, and why exactly it should be easy to deal with? Its 230 fuel 14 CP heavy tank, if its not threatening nobody will use it (which is exactly whats happening in current live game)