The bit that is missing is the comedy
I don't know, its just not very funny any more and to a large point, the characters are just not good, Ahbed in the first 2 years was a normal guy who was a little quirky. He was into films, predicting their futures because he read human nature so well, he delivered a kid, he was friends, he got drunk with Jeff, he wasn't a god damned robot, and now, he is being written as a guy who has no ability to interact with others. Brita is only a therapist and Troy's ackward girlfriend, nothing else. Annie wants to be with Jeff, and thats really her entire character, Jeff is just an a-hole oh, and has daddy issues which they've not moved forward for 2+ years, Troy is Brita's ackward boyfriend and Ahbed's ackward friend, and nothing else, Shirley and Pierce aren't even part of the show anymore.
I don't know, its just lacking, every situation they get into is all about one of their characters main issues, haunted house, the years old Pierce feels like he's being cut out theme. last ep, Ahbed's a robot theme. Its entirely predictable now, they've become standard boring predictable characters.
I can't see it going back the other way as, from that interview, it seems like the guys who pushed the show into a simpler more boring show, are basically in charge.