im not sure but would it work that there would be time period of limited resource gain when its deployed. It should not last entire time the tank is alive, rather set period that would make it actually be worth to preserve.
if i recall a patch sometime ago, the penalty last for 5 minutes.
TA was nerf several times over the years. Like katikof said, it was design as a last ditch/all in card. at which TA does its job a bit too good specially on 1v1. however on large team battles, his strength diminishes as they are more counters against him