I think its fairly good casting although wasn’t XMen 3 loosely based on Dark Phoenix and didn’t original story take place in mid80s not 1991? Kudos for trying it appears to stick with original storyline at least.

Although was Lilandra a mutant? I thought she was just a humanoid alien who was not a mutant since her powers were natural to her species.

http://comicbook.com/marvel/2017/06/15/x-men-dark-phoenix-setting/

Double link due to kinja.

http://comicbook.com/marvel/2017/06/15/x-men-dark-phoenix-setting/