Author: Vecher (RU server)
this post was inspired by Vecher, who proposed an interesting thing. As you perhaps know, several vehicles in the game are equipped with unhistorical guns. One of them is the KV-2 and its 122mm U-11 howitzer. This gun was never mounted on the vehicle as it was only developed after most KV-2's were destroyed, captured or phased out (in early 1942). Furthermore, KV-2 turret was specifically developed to hold the 152mm gun, putting a smaller gun in it makes no real sense. The U-11 gun was later on used on the KV tank, yes, but that was the KV-1 turret (such modified, the vehicle was called KV-9).
What Vecher proposes is to get rid of the unhistorical gun by replacing it with something else. This is however not the plan of Wargaming as Storm specifically confirmed that in HD, KV-2 would have the same guns as it has now. The reason why the U-11 was introduced in first place is actually quite old - veterans might remember that in World of Tanks, KV-1 and KV-2 used to be one tank (on tier 5) - yes, the 152mm KV-2 used to be tier 5 and yes, it was exactly as OP as you think it was. The U-11 was one of the alternative guns for the KV-1 turret, that used to be the stock turret of the vehicle (elite turret was KV-2). When the vehicle was split, the developers (unwilling to change anything) simply took the U-11 gun over for the KV-2 (in the old KV, the gun was usable in both stock and elite turret).
The solution would be to replace the 122mm U-11 with the 152mm model 1909/1930 (very short 152mm gun). This is how it looks:
This would actually make the vehicle more historical because - as mentioned above - the big turret was made specifically to house a 152mm gun. This is how the modified version would roughly look:
But what about the other tanks that have this gun? Well, actually, strangely enough, there was a project of the T-34 tank equipped with this gun, although in a very different turret. It was called T-34Sh ("shturmovoy" - "assault"), also known as T-34G or T-34-122. It was developed and proposed in 1942 but with the appearance of the SU-122 and SU-152, it became obsolete and was cancelled in the Autumn of 1943. This is how one of the proposals looked. It would be a good premium tank actually.
As for T-43, the 122mm version is probably a fake.