What i would like to see happen with the KV-8.
-Increase its armor to that of the KV-1
This would help it deal better with blobs, which should be it main role
-Lower its cost to 120 fuel even 115 fuel (would say the some for the KV1)
Neither the KV1 or the KV8 are worth there fuel cost right now. I mean they have better health and armor then most medium tank, but really lake the fire power.
-Make it easier to gain vet
I have never seen one hit vet 3 in like 2 years of playing this game.
-Give it a Vet 1 ability to make a wall of flames (like the Chinese flame tanks from C&C generals)
Would help to deal with blobs, and anything is better the Cap pints vet ability. I mean anything
-i also would be game to some of the changes to the M-42 gun.
Armour would be good along with veterancy rate(most AI tanks suffer this), but I say no to make it cost less than a PIV in terms of fuel. You're paying for durability, heavy-tank properties(crush) and its firepower isn't horrendous, it's just different as it a sustained DPS unit rather than relying on burst. Veterancy could be the flame wall or another combat boost like the WFA armies tend to get.
On the 45mm gun, I don't see any problem with making it like the 45mm ATG. It would at least shoot fast enough to be a nuisance to tanks when it gets closer along with a weapon swap time reduction.