What's your issue with Jennifer Lawrence?
Far and away the most over-rated actress in the last 20 years.
Terrible physical presence for Mystique
Mystique is ultra athletic, with hyper reflexes, and moves with a fluid gracefulness
Jennifer is wide hipped, horsey, and moves with a plodding clumsiness (in her scenes when it's really her, and not the stunt double)
Rebecca Romijn was ten times better, and the perfect physical presence for the part.
Heck, anybody else would be better.
Jennifer IS NOT superhero material
Let her stick to girl next door type roles
+1 - My thoughts exactly