Multiplayer:
Worst multiplayer ever, sbmm is a thing of the past. Literally my first game of mp I got put with players who are already prestige 3 and it goes to show treyarch isn't about first impressions cause my first initial thought was that it's impossible to level up or that it was just too unfair. For a game where the community is primarily based off of mp these days the game is basically a step down from what modern warfare was, graphic wise and software engine wise, it's just a joke and like moistcr1tikal said "it feels like a parody of what call of duty was 9 years ago".
Campaign:
The 1st few missions of the campaign was phenomenal the aesthetic, soundtrack and the new characters brought in, the rest though not so much it would've been a smooth sailing campaign if it wasn't for the choppy cutscenes, and it's not just me youtubers like the act man have based there campaign review off of that too, its a shame all that potential went down the toilet so fast after the first few missions.
Zombies:
Zombies was fun, very innovating for future maps to come. I've played every map since WAW and at first I was sceptical at with the health bar system but I honestly don't mind it, I do feel they could've made the game mode a lot less easier but other than that I have no problems with the mode.