There’s such a lot that was shot which isn’t in the film, most of which is the absolutely right decisions, but there was extra character stuff. The most important thing, and I think the intention always was that the relationship between Charles and Erik to be central. I think that as the film evolved it became clear how powerful that was. It was important to not trivialize the differences in their ethics and outlooks by not having it to appear to be about one person. Moira is a really strong character and her involvement is massively important, but in earlier iterations, before we came along, there was a sort of love triangle thing. We had already very much drawn back from that but it was ultimately a matter of drawing back from that even further.
Sometimes things go just because of length, but it was also sometimes in service of actually allowing the Charles and Erik relationship.
When you write a screenplay, it’s the combination of things you put in that convey what you want the character to be. When it reaches the editing stage it is no longer in your hands so it’s obviously not going to be exactly the way you planned it. In service of the film, these cuts were the correct decision, but in the service of Moira’s character, it doesn’t give a full picture.