It would be lovely to just yarn add something that would give me Material-UI components already set up. I'm sure others would love a Bootstrap version... etc. The more you can lower the barriers to entry, the better.
While it didn't take me that long to do, it does have some weird edge cases that I had to google around for. It would be nice to not have to figure this stuff out with your framework too and would encourage me to try it out more quickly.
I know that formik and redux-forms are popular, but react-final-form and your framework seem to have a lot of overlap. Both seem to be pretty well done.