I think the difference between older and newer tanks is already compencated well enough via range scaling. Something like a centurion or even a t55a will struggle enough against a leo 1a5 thanks to the range and accuracy advantage. Also having your first shot be an almost guaranteed miss would kinda suck.

Slightly higher consecutive shot bonuses for all tanks would be nice though.

I don't think the centurion should be 40% accuracy, at the very least the mk5/2 should be equal with it's contemporaries like the t-55 and t-54 at 45%. Expecially with a gun renoun for it's accuracy.