To no one's surprise. Most, if not all, AAA first party studios at MS are having issues. It's not a coincidence.
This alone should be grounds for the acquisition not going through. Devs go there to die.
This is just a big guess based off past history with micro buying companies and the turmoil ensuing. You could have asked any one of us here and we would have guessed the same. The common mantra here is "Microsoft will fuck up and mismanage their newly acquired companies" and for good reason.
Well, when you are designing your games strictly for Gamepass and around Gamepass, we see the results