Thinking back to the MG/HS thread; it seems that there's a couple of running themes through his shows.
1) He almost never did a straight quiz show; and if he did, it didn't last long.
2) But for one game, humor/comedy takes a backseat to the gameplay.
Based on those thoughts, I'm shocked that he even agreed to do MG/HS in the first place, since both shows are based on the inherent humor in the two games. He didn't want to do MG '73 anyhow, what made him think he knew how to improve a game that didn't need improving in the first place?
As to the first point, he only had two Q/A shows; and I think IdeaMan created both of them. Did Goodson have myopia regarding quiz shows, or did he just have so many shows floating around that he just never did more Q/As?
I will say, that for the long-lasting shows he did create, he did do one thing right, made the show about the contestants. This shows especially in Feud and Price, which may be by design, or it might be a nifty side effect.