I've been playing the demo for many times now. and I'm even more surprised with how much depth and things that could be easily missed from first playthrough.
Things like some dialogue option that reveal character depth only from certain action (The girl dialogue if we immediately decide to shoot Winston from start) and some hidden things like the superstitious house near the saloon when talking to "Sundown" for alcoholic drink.
I can see a lot of potential and replayability with many story possibilities with Bonnie's fate depending on our choice and action.
Also, will we get to see Ronald and Carl? they're probably still with Winston, and with how important he is for Bonnie, I think Bonnie might meet him again at some point. Perhaps even the late post guy too since he's a fan of Winston troupe.