After using it wrong by accident with other players (not always, but the first time I was using it, I made them die once x'D), now I only use Rescue with my wife character, because some times she is so focused in other stuff she don't see the AOE, and I actually save her! XD

I think the most problematic thing with the skill is there is a bit of delay, so if you don't press it perfectly and on a good spot, it can be detrimental...

Personally, I wouldn't like it to be removed, it's a fun feature XD but maybe an opt-out option (not when you are in the boss, more like a thing in the character settings) wouldn't be a bad idea, so you can decide if you want to be rescued or not...

By the way, at least now has much more cast delay, so you can't "rescue spam", because once I had a Healer drag me around the dungeon like my tank was a dog... literally throwing me into mobs, I had fun, but most people would probably find it annoying...