I got the impression that prompts and fills containing ableist content would only be deleted if they don't warn and no warning is appended in the event someone complains that they were hurt or triggered by it (and subsequently complains to a mod). So if you're requesting or writing an AU where Charles was never paralyzed, just add a note in the subject line or at the beginning of your comment being like 'guys, just a heads up, in this prompt/fic Charles can walk' sort of the same way you'd be like 'just a warning, there's non-con in this fic.'