well, the one wing has permanent ticking DoT, which is probably gonna be annoying next reset on higher layers for some classes.
also the wing with increased magic damage taken might be kinda bad too with specific bosses that like to spam aoe spells.
I think we kinda disregard them for now because we have seen them only on the weakest, third layer so far and will be in for a small surprise next reset.
I have finished layer 6 on DH, MM hunter and guardian, personally, I think vengeance was the easiest, had to switch from havoc for coldheart 6, but I haven't tried BM, which is supposed to be godly and my guardian is undergeared, so It might be better, but I can't say for sure