It's probably because his take on Magneto is well liked.
Haha, notice he sees Magneto as a hero. Why is that?
Because back in the 80's when Emma was a New Mutants villain, Magneto was leading the X-Men. I see a pattern here.
Emma should be a villain because that was what she was in the 80's. Magneto should be a morally grey anti-hero and ally of the X-Men, oh right because that was what he was in the 80's.
It's so predictable, Emma's story never gets past the 80's, none of these writers have read anything about Emma in the 90's. They never read about the Hellions being killed, they certainly didn't read the Phalanx Covenant, they didn't read New X-Men. It's just 80's Clarement > skip forward in time > IvX and that's what matters.