This certainly could wind up being a trainwreck as a Minecraft fan, but looking at what Mojang has done over the last several years (read: barely anything), here's to hoping that Microsoft can help get shit like the modding API up and running. Everyone makes the Rare jokes, and yeah, Rare is a fucking husk of it's former self, but that was all under the previous administration and it seems like the new brass is at least trying to right some of the wrongs.
So I'm hopeful. It's not like they can realistically do LESS than Mojang has, and even if they fuck everything up with some shitty update, the modders and PC community will just stick with the last good version and go from there.
Also I like Phil Spencer. He always seemed like a slimy business guy before, but it seems like he's figured out the right mix of being sincere while also acting like a professional rather than trying to masquerade as "just one of the guys".