Yes, the UI is an area that many people would like us to spend more time on. We actually had a major redesign with REI3.0 a short while back.
Right now, we are working on functional features - mostly for organizations working with REI3, which need to be able to do more with data and to help with administration.
But we plan on getting around to the UI again - It might take a while though, sorry 🙂
PS. Users can currently adjust the UI in different ways in the user settings - it is not extreme but might help a little.