The Rockefeller drama and especially the divorce can definitely be avoided and Ellen would not bring up anything her guests don't want especially something as private as a divorce. Mariah doesn't have to address anything about the divorce or about their private life. In fact, I think it would be good to not speak about it. At the most, just a "we're doing good". I could see Ellen mentioning the Rockefeller performance though and saying a few words to defend Mariah..
I do think that aside from delivering a good album and a great lead single, everything else was kind of a mess and a drama. The whole year was actually just..exhausting. It was just taking one hit after another. Nothing seemed to be going right. I'm glad it's over tbh.