In a weird way as much of a disastrous decision it would be, I might actually take Ange being sacked mid season for Ryan Mason because the knives would well and truly be out for Levy. Not something he could quash easily at all. No big name managers he could bring in to shut it up. No sticking plaster players he could bring in for a temporary manager. Might speed up the takeover.
I think Levy could ride it out. He's pulled off similar tricks before. He even got away with sacking Mourinho mid-season before a cup final, then taking months and months before finally appointing Nuno and then sacking him two or three months into the season for Conte. And let's not forget, fans were buzzing the day we appointed Conte, despite the shambles leading up to it.