I'm kind of amazed to the fact people took so long to notice this is possible..we've been using this..mechanic for months now, no need for a moogle fight to discover it

I see no flaw with it though, if I get ressed in the middle of a group of angry skeletons but do neither move nor enter fighting mode, why would they even notice me?
Something which does NOT notice me should not aggro either

So calling it an exploit is a little bit over the top in my opinion
Oh, and it does not mean instant win, OP.