Honestly, this version of the Dark Phoenix story looks visually terrible in many places - where is her costume? The other X Men look terrible in their costumes. And most importantly the screenplay is terrible with Storm carrying an umbrella in one scene where she should easily be able to make the rain go around her and stay dry. Mystique was not in this story (from the comic book saga) and Lawrence does nothing but make us miss the first actress who was so dynamic in the first two films. There isn't enough character development between Cyclops and Jean (the two main stars of the Dark Phoenix story). And Jessica Chastain's character was not in the original story and seemingly is bizarre in this one.
They should not release this movie - seems like a sad way to go out. The Dark Phoenix story by Claremont is their best story to date and probably will remain as the top tier one since the franchise is surviving off of fumes from the 80s.