I hope this answers your questions. If you have any further questions, please let me know 👌
1. Yes, there are happy routes planned. They're marked as "love" on the flowchart. The goal is to have at least one for each girl, since it's not the main focus of the game. They won't be very long, but they'll be available for people looking for something like that.
2. The Patreon version offers access to the exclusive girls (Alexia and Alice). Alice is one chapter away from finishing, and Alexia still has more chapters to go. This version doesn't offer more chapters because the updates follow a rotation, so it only provides access to the girl with the story as it stands at that point