Neon’s A Doll A Day… Again (2020)

[Alliecat]

What a lovely photo -- sweet & peaceful!
Poseability is why I won't get into BJDs -- Annie's a bit of a chore to pose, sadly. I don't really have any good advice, sorry... since shelling characters isn't a thing for me (not that I wouldn't love an action figure of a character or three, but it wouldn't be a Pullip ).
Maybe you could get 1 or 2 of the characters you'd most like to shell and see if you change your mind any...? Rebodying to deal with loose bits gets ex$pensive...
I think it would be a real creative loss if you were reluctant to play with Oddwickshire because of not having dolls for the characters. I see your point about mixing "species" though, and can see how it would feel discordant.
Sorry I wasn't much help But let us know how your decision goes.