Oof.
Okay, well now I can see how the ability can cause problems. However, I think a bigger HVAP-specific RoF nerf would make HVAP useless because of the huge difference in DPS. Perhaps a nerf of the base RoF, since 76mm HVAP was historically very effective.
But base RoF is the entire point of the tank. IMO re-increasing the fuel would be better because it’s supposed to be sort of a ez8/okw p4 tier tank anyway. That way you can still sort of have packs of them but they’re not one on one overly cost efficient.
As for the 76mm sort of seal clubbing ost p4s, I don’t see that as that huge of a problem since panthers pretty much seal club Cromwells and Shermans. Obviously the panther to Cromwell/sherman cost ratio is much different but the 76mm is a lot less tough and therefore a bit easier to counter when supporting elements of an army are considered (and not just in a rank 1v1 vacuum). Maybe a slight cp increase along with fuel increase if it’s too drastic would solve that issue.
Edit: actually, even the okw p4 pretty handily beats the Sherman and Cromwell too, so that’s an even better comparison. Cost ratio is still a little higher but okw p4 is also slightly better against infantry too.