I do actually have some suggestions. Some of it might already be in the game, but I haven't noticed, so my apologies if that's the case.
One is to add more mechanics around the types of cryptids and the buildings. Say they would get attracted to the building and stay near, but other surrounding buildings would affect their happiness. The visible affect range would be great. This would lead to the resulting winning map being more like a real camp with zones suitable for different visitors.
Second is to add some cards that would manipulate the cards/deck. So that you could add some specific cards to the next day's draw, copy cards, remove cards, etc. These might also have some effect as building, f.e. that they are favored by some type of cryptids.
So (I guess it's third) you can diverse your cryptids to types revolving around deck manipulation buildings, around building many preferred buildings, around making remote hideouts, around building and cryptid variety, etc.
I hope you'd find these ideas useful. Good luck!
