1. No
2. No
3. No
At most you will see more stuff on the shop and integration into gamepass MAYBE but i doubt it because it still makes way to much money with the sub.
It will mostly affect internal processes at blizzard regarding projectmanagment and responsibilities with probably some kind of leadership change for MS.
We will not see any change ingame whatsoever. MS does not gain anything from fucking up an existing companies plans for a game that still shits money left and right.