I agree that she should have stayed dead. And I say that as someone who loved Phoenix-Jean when I read this and was heartbroken when they killed her. X-Factor wasn't worth the retcon, IMO. They could've used Maddie (all the Nathan stuff would have been more meaningful) or Rachel or another character for that O5 vibe.

I will also say that I wish the Phoenix had never returned. Rachel could have just been a powerful telepath / telekinetic / chronokinetic with that as her power signature, like Psylocke used that pink butterfly. She didn't need to be "THE Phoenix". I can't think of another great use of it and most are terrible.