Why didn't any writer remember that Rachel Summers had more control over the damn Phoenix Force than anyone else.
Rachel should have just came in and seized the Phoenix Force and then forced the Avengers and X-Men to sign a peace treaty, end of story...
Then Rachel tells them, "Do you want to see why you shouldn't fight each other, let me send you to my world where the Sentinels killed the X-Men, Avengers, and Fantastic Four at the same time to eliminate anyone who could challenge the machines!"
"Here let me send you to the graveyard of heroes on my planet so you can get over your stupid conflict!"