From the video i saw on the update 11 on your channel at YouTube, i saw that the UI uses one colour for all regions and systems.

Perhaps making the regions have (a max of 5) different colours to make them unique. This would make the navigation of the UI in terms of the exploration much easier as you can recognise the region's colour more quickly than by it's name.

In terms of the Data Editor, I am not sure how you could make that better. It looks amazing so far, someone else could perhaps offer some ideas on that.