I didn't have a big problem with the amount of time they spent in the college, it could have been shorter but at least it mostly felt like it was moving forward. I had more of a problem with all the trips to Rosswood because although there is some great stuff there, more than there is in the college scenes, there's too much of it and it often just feels like they're running on a treadmill.
The best scene at the college is the one where he's in those pipes. I would not have wanted to do that.
I might actually start rewatching the series right away, although I'll go through it more slowly the second time, to catch the connections that I missed.
So did everyone figure out that Tim had been a patient at the hospital? Tbh I didn't, I assumed that he'd explored it as a kid and that had been the beginning of everything. But in retrospect it was probably supposed to be obvious.
And did everyone figure out Brian was the guy in the hood? I did, I can't remember the exact point but really if the identity was going to be something they would reveal then he's the only candidate (technically there's Seth but it wasn't going to be him).
What is the significance of showing Alex as a little kid?