MIT lisenced; feel free to fork it if your feeling especially filial

It's FOSS, so you can use it primarily for output with real switches and knobs for input. But then just using plain LVGL would probably be more practical.

What would you have wanted to see?

I mean I kind of get your frustration, but I don't think innovating the user interface is not really the goal of this project, the opposite actually, it's moreso trying to provide a well-known user interface to devices where that was previously hard, so the goal is to be similar.

I would like to see some fresh ideas in UI though, everything is the same nowadays... :(