Hello there, thank you for your input.
I have read your feedback, and I understand your concerns. Godot was chosen to be used for this Visual Novel for the same reasons you have mentioned: I have played visual novels in both Unity and Ren'py that had FPS Drops, and I wanted to have more control over the VN itself, if the project gets too huge, there's a huge chance of being very hard to fix typos later on with how Ren'py organizes scenes, and Unity is paid at the end of the day and very annoying to work on.
About your considerations on the system, I know there are some missing features and I will code them into the game as Patrons eventually start voting on them in the future, but skipping with a key and other small features are added to the roadmap already :)
I will keep in mind the writing and make sure it's less descriptive if not needed. Eventually, the game will have hand-drawn backgrounds, so I hope those can help.
The text size changing is a thing I'm considering, but that would mean a reworking of already written and added text into the game, which can take quite a lot of time, so I will probably also add a feature that allows you to change the text size and add more speed for text scrolling, too. These will eventually be implemented, so thank you for your feedback!!