Developers seriously need to work to incorporate designers in OSS more. Even just basic UX would go a long way for many projects. Maybe some sort of better issue templates, or perhaps a more custom solution is necessary?
I'm currently trying [1] this but I don't know how to pick up more traction from designers. Perhaps I'm looking for someone who can both design (change an existing new design) and implement it at the same time, which may be too much? I don't know.
Good designers can make a project succeed. We need more in OSS.
In my experience it is much easier to find someone who can mockup/wireframe well with no coding experience.
I personally enjoy the process of taking a design and bringing it to life in the real codebase. I find it somewhat meditative and a good task to work on when you brain is a little overloaded.