. . . Why?
Look, I like Fraction. I thought his Iron Man was fantastic, his Defenders was fun, I enjoyed his Fantastic Four and FF, Hawkeye's obviously excellent. But his X-Men work was totally mediocre. (Having Greg biggest-hack-in-the-industry Land as artist for so much of it certainly didn't help. But the writing and stories weren't anything specia, either.) Why would you want him back on the X-Men?