I think you are missing the point entirely here...
Nope, i'm not missing the point.
I'm a PC player and i dont care about console exclusives.
As a result, i dont care if MS gets Activision or not
And to be honest, i'm more worried about Sony's vast IP owning rights in various entertainment areas (Movies, Music AND Games) than i'm worried about MS getting another gaming studio that will keep releasing games for PC (and maybe for other gaming platforms too)