Haven't bought a COD since Black Ops 1
I'd say its bout time they focus on it being a total MP experience.
For me, COD4 was the only one to have a halfway decent Single Player Campaign and even that pales compared to Wolfenstein's, Doom 2016, and I even say Rage....(clearly I like ID and Bethesda)
From my viewpoint always thought it'd make more sense for COD to be like a $5 monthy subscription game that just updates every year with new content.