I find Rockstar's attempts at online pitiful. They garner huge crowds no doubt, but NOT because of multiplayer.
I have 350 hrs in GTA V just for the PC edition. I also bought on release day for the PS3, and bought the PS4 version as well. I have spent maybe 20hrs in multiplayer, the last hour being well over a year ago.
I'm never one to try and take things away from people but I just wish they fucking put more effort into releasing more single player campaigns rather than their online play, GTA V being the prime example.
The online is good, but it is NO WHERE near as good as Left4Dead 1/2, Halo 1-3, Counterstrike, COD xxx, or the other mainly multiplayer games.
Rockstar has far too much talent to waste on multiplayer because multiplayer always boils down to a core mechanic. The best multiplayer games can have meager budgets with mediocre staff if the core mechanic is solid.
All the extra full Rockstar adds to their multiplayer is just wasted fairly dust imo. Better to focus the effort on creating more adventures.