They need to make an isometric turn based multiplayer game
I only played L4D a few times and I couldn't get into it. To each their own
Oh, I had a blast w/ both L4D1 + L4D2. I think the appeal for me w/ that was the game played like a SP game (with a story, characters, and 3-4 part episodes) - though, you normally had other players w/ you; and it would take you around 40 mins at least to punch through an episode. Throw on the fact you had multiple difficulties and also the competitive MP portion - yep, that was what kept me coming back. Didn't hurt when free DLC + SDK was released, as well - kept the life-span of the game going.
Titanfall (base-game) just lacked content. As fun as it was, after 3 or 4 hours - I felt like the game was lacking content. Maybe it's all in the Season Pass? Don't know, it ain't cheap enough to suit me to get it. Good thing I won it for free in a contest.
It's NO surprise to me Evolve lacks content, from what y'all are saying. Just look at Turtle Rock's history w/ L4D1+2 - both base-games out-the-gate, 4 hours per one play-through if you play SP/Co-Op Mode. At least w/ those, you also had the competitive MP portion, as well - so, that could certainly also eat up some time. So, you had a fair amount of content here, at least - maybe by 10 hours, some might be bored; some might not.
With all the DLC schemes for Evolve we knew before-hand, probably attempting to out-do Titanfall for likely being the poster-child for "Make great foundation for base-game, but don't give it tons of content b/c that'll likely be in the Season Pass" - no surprise to me that it turned out lacking content.
I also think some of today's modern MP games - i.e. Titanfall - suffer from Lack of Content syndrome + No SDK syndrome. It always great to get more official content from DLC's, but that often just isn't enough to suit old-school gamers like me. I only see this getting worse in the future, as well.
In the old days of Quake 2 + RTCW, you had no problem finding new content - that's b/c modders were making new maps + even new game-modes. And even if a game company pumped a new expansion out, you'd eventually want get that expansion for their new official content; and also it would be a safe bet that some modders would make mods that require you to have the expansion.