This is a most interesting episode to ponder. I am certain Dwight is going to turn against Negan at some point. Eugene, though, I hadn't really thought about. Now that I do think about it, I'm thinking that Eugene, in his entire life, has always felt like the outcast, and never in a position of power and authority. Never. Until now. If he is now going to receive all of the respect and authority and power that he never had before, he might cling to that with his dying breath. Yeah. Amazing turn, but also perhaps some realism in it, believe it or not. He's loving it. Plus, he can play Yars Revenge all day long, which is cool and comforting to a guy like him.
Sidebar: I sure hope they do a backstory episode on Negan, kind of like they did with the Governor (as well as with Morgan on the good side).