Yeah, so if Duncan gets digested at all he's not supposed to show up. It was just brought to my attention that yes, his sprite will show up at the end of Ollie's digestion ending sometimes. It's a minor bug that seems to have been caused by me missing a variable/conditional in the code for that little bit at the end. I'm not too worried about it since it's not a huge part of the scene and doesn't include any dialogue from any of the characters, so I'll just do a quick fix and include it in the next update whenever that happens to come out since I don't think it's enough of an issue to do an entire new update release for.
I can't say that there will be a route where you can just eat everyone at the party(I'm not a huge fan of my OCs being in situations outside of their preferences i.e. if they're only pred I don't like them being prey and vice versa), but I already have at least one other character that I'm thinking will possibly be a switch(so his scene might involve an option to both eat him or be eaten by him), and I won't say who, but there's one character already in the game that I've been thinking about changing into being a switch as well(no guarantees, it's just something I've been thinking about)