No matter how good X-Men '97 is, no one should be advocating for Beau DeMayo to be rehired until we know exactly why he was fired in the first place. Considering his history (he was previously fired from The Witcher for being toxic to the other writers), there's certainly enough to suggest that it was for something serious and Disney/Marvel is telling everyone to keep quiet about it to avoid bad publicity for their latest hit. It would also reflect really badly on them if it came out they put someone into a position of power who had just been fired from another show for toxic behaviour. After the first season is finished I wouldn't be at all surprised if more details eventually do start to come out.