[Sylos]

I have yet to see a maintainer of an open-source project who wasn't hopelessly excited when some UI-person took to their project and tried to do things with it.

Most programmers are aware that they are terrible at GUIs. Heck, a lot of these projects are specifically built without a GUI, so that someone else can create a GUI for it.

And if a maintainer is really opposed to it, then there's always the option to create a fork and see which version people prefer.