WHY ???????? They were all a piece of , well you know. We have talked this one into the ground. British tanks could not even compete with our current tank selection let alone any further uber selections. In my opinion the Stug would make the most sence since it would bridge the entire ew-lw era's and then move up from there. But a British tank doesnt make sence. The KV models don't make any sence either. T-34/85 or Panther would make a better addition. The KV 1 was on a basic T-34 frame so killing it the same way you kill a regular T-34 would be all you need to do. The turret might take a little more of a pounding than the T-34 but that's it.
The only thing shared between the T-34 and the KV1 was the engine, transmission and gun. Though, I do agree that adding the KV1 at this point adds nothing new to the game that the T-34 doesn't already offer. The only real thing the KV1 might offer is better armor but by 1942 the invincibility the KV1 once enjoyed was no longer there after the Germans started to field better armament for their tanks.
It would end up being just a pill box in AH for base defense.
ack-ack