Just picked this game up at the weekend. Haven't played a COD since the first Black Ops and was in the mood for a linear war FPS but didn't fancy spending ~£40 on BO3, so got this for £10 in Game. Played about four missions so far and it feels good, although I haven't played anything which has felt particularly memorable yet. I liked the car chase on the freeway, but I'd have preferred it having been player-controlled like the chase at the end of Uncharted 2, instead of a glorified QTE.
Visuals are amazing and I like that many of the levels feel quite wide open, although I'm constantly having trouble spotting enemies. I like the threat grenades in principle, although I wish I didn't need to use them so much. The gadgets you get are cool, but honestly so far feel a bit unnecessary, and given that my suits keep switching between missions I'm never quite sure which gadgets I'm supposed to have at any given time. I keep trying to deploy the wrist riot shield and it not being there - and I know it gives you an overview of the suit you're wearing on the loading screen, but I don't feel like the game did a very good overview of the suit abilities or the hotkey for them.
I'm typically an offline-only player, but are any of the other modes besides the campaign worth playing?