Yeah I had one get stuck on the minigun, had to kill myself and take control to complete the level.
It's very much Left 4 Dead though, doesn't seem this beta/open weekend had any variation in the PvE map either, the "blocked" sections remained blocked in both my runs. I didn't try PvP though. $80 however feels too much, I think L4D only gained success because it was affordable and I believe they even offered a 4-pack discount so you could share with friends.
I didn't mind L4D, but the pricing is way off from what it should be for the game play. its a bit mindless for me, which at times is good, but for strategy shooters , Enlisted has be hooked.