Your sarcasm is not constructive. If you disagree with my proposed changes, you should discuss what you disagree with and why, or come up with a better solution.
I have already, and so have others. It isn't imbalanced and it is an essential ability that helps even the odds against heavier Axis tanks. I don't think the synergy with the B4 is OP, it just works well together and requires communication/good skill.
There are already ways that you can deal with Mark Target. You an reverse out, smoke out, or blitz out, or simply kill everything. Reversing is the most easy, because the opponent will have dumped a lot of munitions for nothing. If you stay and fight while being marked, it isn't a guarantee that you will not get stunned, engine damaged, etc., which can further lead to the tanks demise. Additionally, if you got surrounded by flanking tanks or backed into a corner and got mark targeted, it isn't mark targets fault, the opponent simply played better or someone made a mistake.