I'm just not sure why the MCU would bother. If they don't produce a "better" version than the Fox films (good luck), fans won't be satisfied with the portrayal. While that won't ruin a movie, when the MCU is basically hitting everything out of the park no matter how wonky the pitch, why take a risk with a bunt like the X-men?
I just don't see that they bring anything meaningful to the series that wouldn't amount to a retread. The Fox films repurposed the "allegory for racism" angle of the comics into "allegory for LGBT hate" in their films, but the MCU has taken a stance of "fuck allegory, let's stop beating around the bush and talk about actual racism", both in Black Panther and particularly in Falcon and the Winter Soldier. While I'm not particularly happy with their representation on other fronts, I'd rather they actually introduce LGBT characters and tell those stories directly rather than using an inevitably clumsy allegory (since, with mutants, it's not just "I love who I love and why can't you accept that", it's "when I get angry, I make things explode" or "I accidentally kill everything in a 100-meter radius of me", which is obviously harder to swallow for completely legitimate reasons).