Removing the tank is not the best idea in order to use the tank to its best you need 3 players to coordinate and work as a team. I have saved loads of squads by using the slammer in this way ie mobile cover so medics and get downed players, taking out a t-100 that's moved up on a squad and so on.
I understand were you come from 1 person sitting on a hill killing everything is not fun they should be with the infantry supporting the attack as the tank is meant to be.
So removing the tank would make problems not really solve any. Its a asset just used incorrectly, don't punish the tank its tool punish the user lone wolfing, wasting assets etc.