I'll give you a million dollars for that hat!
Just like Left 4 Dead, they release YET ANOTHER GAME before the last one has a chance to grow legs... The game mechanics are stale by now, and there looks like nothing new being offered, just more of the same puzzles to try to cash in our love of (the old retired meme) "The Cake Is a Lie."
GREAT JOB VALVE. I lose faith in you every day.