TBH there is not much that I could really suggest that probably hasn't already been suggested or you've already planned for a future version. But the only things I could really think of might be a vore function just to give another use for captured monsters, and possibly the ability to copy species to other characters instead of just the driver, as well as a use for the villages as a possible place to change out characters for different ones instead of having all of them piled in at once, so you have the ones you need for whatever adventure is planned.
But I have enjoyed the game and besides the sexual parts of it, it is a fun little management/resource gather game and hits all the right spots to make me want to keep going. I can tell that this is something you are passionate about and can not wait to see how it improves in the future. Keep up the great work.