The time-displaced O5 was one of the worst ideas in theory and in practice I've seen at either one of the big two.
Does it need doing?
Yes.
Then it will be done.
It really should've been left alone. That or-
Yes, one arc. Let Beast try and make his point, the characters maybe bring the team back together or drive them further apart and then send them back.
I didn't like Jeen. I mean, I ultimately didn't like any of them, but I wouldn't have brought only her back either.
Does it need doing?
Yes.
Then it will be done.
The two closest to my opinion of Bendis as a writer, and his tenure on the X-men, that Ryan Murphy comparison is so freaking spot on. He has such interesting concepts and in almost everything I've read from him beside the initial opening. His runs tends to veer into mediocrity, and the worse offense for me is what he does with his characters, Bendis is clearly aware of continuity yet will go out of his way to retcon stories even his own in the same run. It additionally, frustrating because he forces characters into roles they don't need to play, then doesn't even bother to follow up with what he's written.
As a fan of Jean, I appreciated him bringing her into the fold, yet nearly anyone who used her beside him or after did a much better job portraying whatever he was doing for the first 20 or so issues. I genuinely can't think of anything of substance any of the other characters he had did, everyone is kind of just there similar to his Avengers run.
I've said it once, and I'll say it again, Bendis would make a GREAT plotter, but without a GREAT editor to reign him in. Bendis writing consistently does the same thing, present intriguing ideas with awful execution and an ending which is flat and not at all fulfilling.