Glad you had fun with it. Yes, I'd like to have something more for chapter 4 and 5, that's one of the last things I have on my list of things to do.
You are right that I should change either the library entry or the tablets a little (I added the library after the temple, and I must have gotten a little overzealous with sharing some details, especially the Byr connection, so I'll remove that reference and make things less obvious/wrong). You gotta put yourself into Erica's shoes, though: she wouldn't be very willing to believe she descends from demons. Also, wars are fought all the time (I don't think the tablets refer specifically to humans as the enemy), so there should still be some ambiguity. Maybe I'll add more references to wars with and among other species, to muddy the water. XD
I was originally planning to add a couple of islands with a town/village for each, but this is one of the things getting cut for now. If I ever revisit Caliross with a "DLC" post 1.0, this is one of the things I'll likely add.
Yeah, I need to update the walkthrough (it's a bit hard to find the time, as it takes away from development).
Beatrix can be found at the pub, next to the Queen of Hearts (she sits at the corner). If you are a cowgirl she sends you away, though (the cowgirl "modifications" make your blood unappetizing to her).
There is one special item you can get from the old man at the Bazaar if you have Jin as your slave, but I never actually implemented the special orders, maybe I should remove it from the dialogue options.
Maybe you are referring to an apartment? In the apartment building there is one area you can enter as mouse (I don't remember any houses which require a mouse transformation in the residential district).
Free shapeshifting would be too much work to implement, given how RPG Maker works: it's the kind of stuff you either plan for at the start of the game, and then it's "just" a lot of effort, but it's actually almost impossible to pull off this late into development. Plus, revealing everything about the shapeshifters is actually a bad idea, believe me! XD