Zero character development, barely involved in the story and then he's gone already - what was the point?

What we see at the end is an elaborate trap set by Coop, Laura and the good lodge folk to get Mr. C stuck in an alternate reality in Audrey's dream where he can't do any harm to the real one. Cooper was pretty clearly acting like Mr. C in the diner, and speaking with the same slow monotone ever since he left the lodge. So what if everyone knew he was going to get out again, but laid a trap for him where he'd be imprisoned in this other world. One that is inside Audrey's head (remember, it's been said time and again since the original that they live inside a dream). Mr. C has been trapped inside Audrey's comatose mind. What Laura was whispering to him was the whole plan.
Of course the other possibility is that this whole thing has been just all Audrey's fucked up dream, but I feel like that'd be way too simple. She's clearly connected to this all though given the name checks such as Richard and Linda that come in to play.

I meant that the Giant told Cooper the Richard and Linda plan, which Audrey later referenced in her own dream. Cooper sacrificed himself to keep Mr. C/Bob from escaping by crossing that 430 line and becoming stuck in Audrey's dream.

audrey's dream. the thought never occurred to me. i figured her story line ended for us when she "awoke" clearly in some kind of hospital. it's a very interesting theory. but why does laura scream at the end then?

i haven't looked, but i imagine many complaints about how much footage was recycled in the last two episodes.

Meh.