I haven't detected an imbalance in this yet. The KV-2 has critical weaknesses: 18 second/per shot reload rate in tank mode. Panzer IV/Panthers have 6, 6.5 ish seconds/per shot.
In full deploy mode, it autofires and sometimes targets infantry instead of attacking tanks. It misses more than you think.
It cost 240 fuel and has the armor/hp of the KV-1.
I think all it really needs is a very large pop cap at like 50 or something so it cant just be called out when the player has an already large amount of forces.
yea seriously do it individually first without initiative something like will never happen.
and video/music makers/ediors an idea make a compilation using only in game sounds and make a song out of it like say coh2 theme or even better SNF theme.