No, they jumped the shark in the Jump the Shark issue where Wolverine and Spidey switched bodies! :lol: No, but seriously, Jumping the Shark is the climax of something than it's downhill from there. We had twenty or so mediocre issues, now with Warriors, USM has hit its stride again.
That is just about the only character death/return I've never had a problem with. That's what the Phoenix is about - dying and coming back. It's what it does. Never bothered me. I loved how Morrison handled it though.