I think yes. because of Multiplayer approach developers tend to make mediocre short SP with Mediocre SP. i cant think of any allrounder game that has Good SP and Good MP. either good SP or Good MP or mostly end up terrible.
For Example Crysis series. Crysis 1 was SP oriented. but it has terrible multiplayer. than 2 and 3 came they focus more on MP and thus as a result of mediocre SP and MP.
Best SP FPS are those who are SP focus and MP are those which only MP and has no SP
I hate multiplayer unless its from valve (team fortress 2, Counter strike) and MP is ruining FPS genre.
should dev make SP or MP game and not combine them or all rounder game?