I just want to say that it's clearable with 2 decent tanks and a single healer. Long as you're killing the tail every time it pops you don't even need DPS. I know this because I've personally seen 3 or 4 of the DPS dead for almost the entire duration of the fight and still cleared.

There's no stacking damage buff/soft enrage.

As an aside, if they do nerf it, I won't shed too many tears. I had my fun with it.