Zombies are shittttttttttttttttttttttttt in this game.
BO1 > WaW >>>>>>>>>>>>>>>>> BO2 for zombies.
I played every map once. And 2 of them are really basic maps that are ripped pretty much straight out of Tranzit(So I've been told) and it just really meh.
Griefing mode is fun but it takes forever and is honestly utterly pointless. You can't really sabotage the other team that much...