While I'm no fan of Evolve (it can be fun to watch, but I have exactly 0 interest in actually playing it), I do think it's a mistake to call out multiplayer focused games as being lacking in long term appeal. Sure Evolve is looking to be TitanFall 2.0 in terms of it's staying power, but there are a ton of multiplayer focused games that are still being played and loved now by sizable communities. DOTA, LoL, Counterstrike, Starcraft, a whole whack of fighting games, etc. Heck, even MMOs could possibly be counted given how most of them rely on community and group activities for the veterans of the player base. Of course, none of that matters if you're not into multiplayer games but there's also a lot in those experiences you can't get in single player games so it's not black and white but instead what your preference is. In short, Evolve may be a multiplayer experience that grows stale quickly but that doesn't mean all multiplayer games do assuming you actually like them.