how about making it were every main gun round takes out two sides of a building in town instead of nothing then the whole building, then letting a tank knock two sides down while driving into it?
I know fixing the whole terrain for damage would be a large order, but just the town might not be so bad. then you could drive into a building while having engagements in town!
code the tank to take damage as well from the buildings so that you could not drive threw more than two or three before you were tracked or something!