Why not give it an overhaul, like:
5 factions: Wehrmacht, Panzer Elite, Commonwealth, United States and USSR.
Then each faction have 5 tanks each:
Wehrmacht:
Tiger (or heck, even king tiger! It will be easy out maneuvered by light tanks, and very slow. Gives a lot of VPs when destroyed)
Panzer IV
Panther? - Stug? - Other?
PE:
Panther? - Jagdpanther?
Hotchkiss
Hetzer
British:
Cromwell? - Stuart?
Firefly
Churchill
United states:
Hellcat
Sherman
Perhing? - M10?
USSR:
T34
IS-2 - SPG?
SPG? - Light tank?
And then the 6 abilities to each. The current panzerkrieg is good, but there just isn't that many tanks. And maybe a new map.