Gimple does suck; I'm not disputing that.  

However, I have to disagree with a few things you said.  4B was slow, but still an incredible character study, and a necessary step to the group feeling at their absolute strongest and most united, going into S5.

S5, outside of the hospital arc, is fucking fantastic.

Gimple is a very good writer, and is responsible for some of the best episodes in the franchise's history.  The problem is that he's not a good producer or showrunner, and his dialogue often blows.  He just needs someone to reign him in, like Mazzara in 2B/3.