This is getting blown out of proportions.

Yes, I can see the skill being used for shits and giggles, between friends for a couple of months.

Yes, troll will be trolls. And what we do with trolls? They get kicked, plain and simple. That has not changed at all. Behaviorally bad healers get the boot most of the time.

If your current DF runs are majorly composed of people who just get the job done and GG the run, expect the same to happen when SB hits.

I can tell you this right now: what people expect even more than a rescue from an AoE is a heal after getting hit by one. As long as people are kept alive, barely anyone's gonna notice whether or not you used it. By that same manner, unless you're in a clutch situation where the use of Rescue would save the party from wiping, no one's gonna notice its use.

TL;DR: People are going to experiment with it..and then in a few months, it'll be this skill that keeps collecting dust on your hotbar.