For those that watched it all, and somehow wasn't aware, Clyde Phillips was the showrunner for the first four seasons; he left and was replaced by Scott Buck (showrunner for Nurse Jackie) who did an appalling job with seasons 5,6,7 and 8.
What you probably don't know is that Clyde Phillips almost immediately became the showrunner after Scott Buck left Nurse Jackie and turned an average show into a great one for the remainder of it's run under Phillips.
Scott Buck was the problem with Dexter. Make no mistake. Clyde Phillips coming back to Dexter is a sure thing; almost as sure as Vince Gilligan is for BB/BCSaul.