In terms of in-game monetization, I do want Microsoft to keep their hands off the game, but that's not gonna happen.
However, Microsoft obtaining Mojang is probably one of the best things to happen to Minecraft. Its allowed the game's expansion beyond just the java and bedrock editions of the game with games like Minecraft Story Mode (RIP that game lol), Minecraft: Builders and Biomes, Minecraft Earth, and Minecraft Dungeons.
And with the recent announcement that java edition users will need to migrate to a Microsoft account, I see the game improving. Its most likely not going to happen, but needing a Microsoft account might pave the way for java edition and bedrock edition to have official cross play. All the botnets that plague servers and all the 'free alt' accounts will also be (at least temporarily) eliminated, which is a net positive for the player base overall.