it nullifys squad preservation, avoiding squad wipes comes down to luck, and the 'hard' counters are all doctrinal.
Not that I disagree with you but ISU, JT, Kat, Stuka are all guilty of that.
Why single out the B4 with all of those things listed.
I don't feel kat or stuka is OP, But JT and ISU is a little over the top to say the least.
ISU's problems are compounded with Mark target.
The JT has highest range and can shoot though all terrain and 1-2 punch a tank with its ability.
Sorry for the tangent but at the end of the day, B4 stands currently as a good option for KT,TA,JT and it should stay that way.
We gotta look at the game as a whole to tone down the squad wiping and in JT's case tank erasing.