This looks great! (Which I say, staring at my shelf of X-Men paperbacks.)
Banshee has essentially lost his previous personality, so we'll have to see what they come up with. He never made any physics sense anyway.
Havok's goofy ring theme is a pretty good way to visually communicate his whole "emo Cyclops" vibe in more of a visual form, where Claremont would just throw up a big paragraph of text.
Beast is actually pretty close to the comics, although with less of a scientist vibe than an experimenting-with-drugs vibe, which fits the overall OMG ADOLESCENCE theme of the film so far.
Frankly, I'm just glad they are using actual interesting X-Men with at least one character trait, rather than plucking them from the forgettable '90s roster.