If Gauss Barrel was kept on as a permanent stance, that would make Overheating less of a punishment, but that's... it. That's all it really needs, in my view. The game got rid of a lot of DoTs for some reason, and they've seemingly no intent of bringing them back for other classes, let alone for MCH where we literally only had one. The issue isn't so much DoTs or class flavour -- it's the fact that Overheat is a very 'tacked on' mechanic.