Now that I think about it, Gage literally just got on Legacy 2 issues ago... I don't really see Wolverine's entire side of this lineup getting fucked with by this.
Gillen is a great writer but honestly he hasn't been doing anything that interesting on UXM, so all that side has left is Adjectiveless, which most people hate (I like it only for vamp Jubi, but it has just been bland lately), Gen Hope, which is ending next month, and New Mutants which is really good but far from being super successful...
Now I haven't read a single issue of Bendis' Avengers (they've never been my thing) but if he basically just gets free reign on the Blue team books, is this really that big a deal?