Thanks for reaching out to me, and I'm happy that there are parts of the project you're really enjoying! As for your comment:
It's true that the current version on Itch.io only features one lesbian route with one character, however, the most recent version (v0.15) on Patreon features another lesbian-route with a different character, so there will definitely be more options in that regard. As for that version, there is of course some lag between when I release on Patreon and when I release on Itch.io, but it will come in the future.
(Here is a preview image of a non-Kate, lesbian route, on the mage-route though).
As for lesbian-routes that don't require you to leave Thomas, those are also already in the work. As of right now, there are 2-lesbian routes being worked on that revolve around Sarah staying with her brother. So in the future, it will definitely be possible to also play the route where you stay, as lesbian.
I've written about it before somewhere else, but it's absolutely a promise of mine to allow players to play a lesbian-only playthrough for all of the major-story routes, from start to finish.