Which was the mistake. It turned the result of 7 years of buildup since 1982 into nothing more than a side story for their scramble to get Cyclops off the hook for running out on his wife and child. Her sacrifice had almost no impact and the supposed culmination of her entire story from Uncanny 160 onward was ruined. If Inferno was the story it should have been, Illyana's sacrifice would have had the impact her younger self's death did in 1993 and there would have been no point in bringing her back in 2007. They had to bring her back just to tell the story Inferno would have been in the first place. If Inferno was the story it should have been, the very idea of adapting it without Illyana would be as absurd on its face as the idea of adapting the Dark Phoenix Saga without Jean or the Dark Knight Returns without Batman.
If having the Goblin Queen story means you can't even have the X-Men present at all in the story where Magik sacrifices herself and you are killing off Magik without giving her the final battle with Belasco that's been teased since her origin, then you should not have them at the same time and delay one of these stories in order to do Magik's story right. When Magik's return to life is the first time she's even seen Belasco since her origin, you've completely screwed up her death.