I think Ryan was a good character up until the point he got fired from his boss role.
Then he turned into this kind of pathetic helpless trend monkey.
Might have been nice to also see Karen, Holly & Gabe make appearances, but we got all the characters who were leads for more than one season.
Parks and Rec has people speaking their personal thoughts to the camera, but the camera has no interaction with the plot. Whereas in The Office as early as season 2, the camera helped draw Pam's attention to Angela's candy bar to confirm her suspicions about being with Dwight. And Jan kept asking Michael in her phone talks with him: "Are we on camera?" In Parks & Rec they've never referred to the fact that there is a camera man present, all they do is give monologues as if there is.