I don't dump on Aaron. I liked Jane Foster as Thor. Some of his ideas are good. Some are horrible. I didn't like every random person being Phoenix, but I had no issue for Firehair, or how the Shiar gods summoned the Phoenix when Jane Foster was Thor.
In a twisted since, the Phoenix is finally used as a member of the Avengers and a regular hero. Too bad the Xoffice didn't have the imagination to do this. But I would rather Phoenix be in the Avengers than see another Dark Phoenix story or another story where the XMen or the Shi'ar freak out everytime Jean does a major powerfeat.
I don't even think the XMen know Jean beat the demon Nightmare, because the XMen freaking out everytime Jean does something big still has not yet been resolved.