I agree with almost everything in your post. 2K Sports is really an afterthought here, as Rockstar is the prize. Beyond the GTA series, Rockstar has some great properties like Bully, L.A. Noire, and especially Red Dead Redemption. Activision getting Rockstar would probably mean we'd be seeing yearly releases of these, a very depressing thought. The quality of the games would suffer, as the main focus would be online multiplayer to please people like the guy who said NBA 2K11 sucked because the online wasn't great.
Red Dead Redemption 2: Modern Redemption - John Marston comes back to life as a black ops agent fighting against Russian warlords. The single player is only three levels, most of which is spent playing in slow motion after a giant explosion.