Really.
I thought it was uneventful. Nothing happened that shocked me. Again, they should have set the ending up as a cliffhanger - who's going to move to corporate? Will it be Jim? If so, how will he keep his relationships with Karen and Pam? Will it be Karen? Again, same question.
Yeah, but they did the whole cliffhanger thing last year--and waiting for September
sucked. I'm glad they did something different this time.
In regards to what actually happened:
Jim and Pam - we all saw that coming - the Beach episode set that up.
Right, but there's still some things that need to be resolved. Like, what happened to Karen? Will she be back in Scranton? Is she staying in New York? Did she and Jim break-up? Just 'cause Jim asked Pam out on a date doesn't mean Karen's out of the picture. They left that intentionally ambiguous, which is kind of a mini-cliffhanger itself.
The whole Jan thing doesn't really bother me - she's a disposable character, I never cared what happened to her - there's no emotional connection with her character. Don't get me wrong, I liked her in the beginning but then she turned into a nympho and the whole situation ballooned out of control and made no sense.
Why is she unstable and why should I care?
By herself, Jan isn't a particularly compelling character, but she gives Michael something to do (

) and their dynamic is somewhat interesting and has now gone a whole new direction. That's why you should care.
Ryan being promoted - aside from ruining the whole "wait til next season" idea, I again, don't really care that he's (most likely) gone from the show.
Ryan may be gone from Scranton, but he's not gone from the show, not by a long shot. He just took Jan's old job, that's all. He'll be around just like Jan was--and now he's Michael's boss, which sets up some funny stuff for next year. And B.J. Novak writes and produces for the show, so he'll be around.