I don't really see the problem with Games as a Service as long as single player campaigns get a large focus, much like Mass Effect 3 had a long single player and a multiplayer component many people loved. Gears 4 had a cool campaign (although pretty short) and top multiplayer too. Some games should get more single player/narrative focus than others.
It's entirely possible to do that same thing for new games too.
It's entirely possible to do that same thing for new games too.