I can understand your point.

If Catastroph uses his purple goo move, the player is supposed to hit the float button, so if the player won't hit it and doing his rotation, he'll die anyway. After floating, the effect of the purple goo is gone and the indicator is visible. It's a matter of seconds. So this I wouldn't bother around.

ExDeath, ok, his cape is long. There could be some changes, but
Possible solution- to make the coat twice shorter
would looks really stupid on a badass like ExDeath. Let's say maybe a tick shorter to see the circle