Yeah the IW campaign was absolutely top notch, it felt like a prequel to Mass Effect in a lot of ways.
I still play 3-4 games of multiplayer IW a week. I dunno, its just kinda mindless, I play when I watch a TV show that I don't really pay much attention too, like a podcast kind of thing. Similar with Uncharted 4 MP. I get a few thousand XP, eventually I might hit a prestige level, and occasionally I get shiny loot for really not doing a whole lot.
I still play a single game of Titanfall 2 every day (gotta collect those happy hour bonuses!) and I can't do that in that game, I have to pay full attention and listen to sound and it demands everything. Same with PUBG. But with infinite warfare... I spawn, I maybe kill a guy or two, someone shoots me in the back, I respawn. The maps are all small corridors and its not that complicated. Brain off gaming at its finest, I feel.
Whats funny is I don't play the modern warfare remastered at ALL, for some reason it just doesn't click with me and I've tried a lot. Even though all the jet jumping and crazy gun camos are stupid as hell in IW, I still prefer that gamestyle for brainless 30 mins over modern warfare. It also helps the player base for IW seems bigger (but not as big as PUBG), so I don't always get matched against people who can kick my ass with their eyes closed.