It would be a good product to enter the education games sector, which is growing rapidly. They are mainly buying the name and the userbase behind it. There is a good positive vibe behind the community, so that is worth a lot, but easy to destroy. And looking at previous experiences of Microsoft, i don't have too much faith.
Not sure what their goal is, but it would make sense for them to try to pivot their reputation by buying Moyang and make it even bigger. I am not surprised at this deal looking at previous collaborations they made. The sense of Moyang being a small Indie company is long gone for me, so this cooperative move makes all sense.