Really should have ended the Negan/war arc with no subplots left running. I've stopped watching after that and just don't care anymore, heck the war was pretty boring really (aside from the opening, walker Sasha jumping Negan, Carl doing a John Wick-style gun move, and Ezekiel's tiger owning a guy, not bad), funny how the Governor's attack on the prison halfway through S4 was so short yet more memorable in comparison. Now with Rick and Maggie gone and Michonne soon leaving as well, there's barely anyone left to care about. Daryl, Carol, Gabriel, that's about it. Jeffrey Dean Morgan was doing his best to keep things entertaining as Negan but I doubt he'll be as fun to watch while captured. Like, maybe he'll be like Hannibal in Silence of the Lambs/Red Dragon and play mind games with the heroes but I feel there's only so much they could do with that.
I don't care if it's how the comic works (especially since I couldn't get far into it, the first trade had great artwork but then they switched artists and MAN is the replacement guy's artwork subpar and sadly it looked like he stayed on for good), TV shows going on this long are going to test most actors' patience and they will peace out and viewers will quickly lose interest. I mean, I really wonder if they were surprised a lot of their bigger characters' actors are wanting out? Like, they do realize on Doctor Who that not a single Doctor's actor hung around for 10+ years? Like, actors want to try new things, enhance their craft with different roles, find staying in the same character for too long to get boring, etc.
I can't imagine viewers are going to be sticking around for too much longer. Rick leaving had to have hurt ratings (if not immediately, then soon), and Michonne leaving just twists the knife further. If Daryl and/or Carol leaves, then that's got to be it. I mean, what's keeping viewers around, zombies? Oh boy, sure can't get that in tons of movies and video games!