One of the strongest indicators if an #OpenSource project has good #UXDesign is funding.
Funded projects hire people so one person doesn't have to do it all. In addition, you can actually hire #UX talent. Finally, with dedicated people so you don't have to rely on fickle contributors that will bolt if you don't allow their PR to merge.
That doesn't mean you don't actively engage your community! It just changes the dynamic.