Always seems to happen when MS takes over a studio. I wonder what it is. MS is said to have a 'hands-off' approach, and they apparently have infinite funds at their disposal to blow on Xbox.
But a lot of top industry talent isn't interested in working for them....
In general, to acquire a company doesn't only costs of paying the acquisition: on top of that there are the retention bonuses and the salaries of all these extra thousands of workers.
So often the acquirer asks them to clean the fridge a bit firing a portion of the people they consider aren't important, to have a lower salary cost. Also, sometimes there are redundancies: meaning that some people in the acquired company isn't needed because the acquirer already has someone doing exactly that same job, so the less important of the two often gets fired too.
It is also common that some VIP people asks for a salary rise when acquired, or having a high retention bonus, or to get a small portion of the acquisition fee, because they consider have been very important for the success of the company and that i the acquired is going to earn a shit ton of money is in part thanks to these VIP. Sometimes the negotiations go wrong and that people get fired or leave.
On top of that, sometimes some VIP don't agree with selling the company to some specific acquirer because think it's a bad fit for the adquired. Or that person personally doesn't want to work for the acquirer, sometimes they strongly oppose to the acquisition in the process, which makes other VIP or the acquirer angry. So sometimes they leave or get fired because of that.
And well, there's also many people who simply after many years in a company decides to change and move somewhere else, or has to leave due to personal/family reasons not related to the acquisition or the company. But appears in the news because of the moment it happens, or because was a VIP in a top company.
The things are common, not specific to MS. But yes, some people doesn't want to work for MS.