UX improvements might not be as high in the priority list as other improvements.
Further, as far as I remember, (it’s been a while since I administered a red mine instance) it’s quite possible for an instance owner to actually modify the UI for themselves.
Finally, UX changes come with a significant retraining cost.
With all that considered, it’s quite possible for UX improvements to exist but it also be the right decision to not make those changes.