We do now have a UX repo to ask for user UX/UI reports and feedback - anyone can contribute, no coding required: https://gitlab.gnome.org/Teams/GIMP/Design/gimp-ux/-/issues

Our release posts now regularly feature a UX/UI section where we highlight the work being done. We've implemented a lot of low-hanging fruit and localized fixes, while we continue to grow our design volunteer group and build larger designs.