The “dilemma” is that kill zombies and survive isn’t a good plot for a TV show. It’s fine for a movie of an hour and a half to 2 hours, but for 16 episodes of a TV show it’ll get boring fast. There’s no story, there’s no engagement, there’s reason to turn in next week because once you’ve seen 3 episodes you’ve seen EVERY episode. There’s always moral dilemmas, every half way decent zombie movie remember there are non-good people in the world and your survivors will have to deal with them as well as zombies, it’s a vital issue in the genre.
Remember Rule 2: Survive. If there are non-good people in the world and they mess with you, you kill them too. Simple. But noooooooo, Rick and his crew of crybabies have to agonize over it, spend countless hours second-guessing themselves and babbling on and on about "what kind of world this will become ..." Dude, I got news for you: whatever kind of world it's about to become, it ALREADY IS!
So just shut up about it already and do what you have to do. Please, no more moralizing and twaddle about sacrifice and loyalty and all that hooey. Kill your enemies and move on!