The entire recent arc with Carol did feel a bit unrealistic to me. I guess everyone has a breaking point, though. I suppose. Morgan certainly came back from worse.
I honestly think Eugene is gonna die at some point here. Not by Negan's hand, but maybe in the near future. Seems like something they would pull, they definitely set themselves up for the possibility.
Abe offering himself as a sacrifice means absolutely *nothing* to Negan. The dude is principled, he needs this death to be entirely arbitrary, to make it clear he's not picking anyone for any specific reason. Just a price to be paid by Alexandria for messing with his people.
Also, if they go with a minor character, or even a secondary character really, it won't have the needed effect. I could see them doing that, I guess, but I'd be ****** if they did. Shameful way to use this extremely dramatic and traumatizing character death from the comics.