100% agree. The precedents set would make me think of timed exclusivity for some content and/ or things like custom badges, uniforms, whatever (I don't play COD, but Bungie's done this w/ Destiny) for certain platforms or distro locations (Borderlands 3 and Epic vs. Steam comes to mind).
Microsoft buying Activision could really go either way. Either it provides resources for Activision to crank out more and/ or better content...or MS gets involved in game development and ruins the franchise. Maybe it improves Activision's quality? Maybe the influx of money allows more devs, even at subcontracted studios, to work on Elder Scrolls 6? Activision tried its best to ruin the Destiny franchise, but the loss of Activision's resources have plagued Bungie as well. The buyout could go in a bunch of directions.