One of the problems is that DTC was never good at plotting or pacing. His first EE stint was often shockingly paced and the stories often just stopped, usually ending with a big stunt to try to hide the lack of material. Without Santer's PR skills I guess it's not as easy.
I think Dean only came back to prop Mick and Shirley, which is a shame, as Mick became much less interesting once he was clearly there just to be Shirley's golden boy.
The Carters in general should be more interesting than they are. I guess I should be happy they didn't rush the self-discovery party of Johnny's story, but I've noticed that the actor who plays him has little range beyond endless "baby cry" faces. I guess considering how often Syed made those faces, that's DTC's idea of a gay man. Who knows.