for me, the issue is that it wouldn't be so bad if the player was immune while being heal-invuln. instead, I had sever times during Ifrit HM where I rezzed a player, watched him start to move, still could not heal him, and then he gets spiked by AE damage before he has enough TP to sprint to safety.

At least with the bug, we could start healing a few seconds (plural) faster. I don't mind the fancy animation, but don't let your animation lead people to an experience different than the one their senses (in this case sight) expect =/ This is a bug by the definition used in software engineering.