I defended them at the start of the House of X era arguing you were hitting them too hard and that they would get to it. I regret that now after the terrible Empyre X-Men bait and switch.
Lorna cannot successfully stand next to Wanda, Jean, Storm, and the tons of other characters who matter as long as she isn't allowed a motivation.
I am not sure what is worse Lorna forgetting she survived a genocide or Lorna going AWOL upon her father's death and publishing at best putting that on the backburner for a year. Oh, publishing will get to her dealing with his death eventually, but the Magneto legacy story by that point in time will be entirely owned by other characters as far as fans are conserned which has been done rather intentionally.