Might this be useful or too much work for little reward?
Have an option to show (toggle?) the scan/rangle circles of all of a player’s stars at the same time so you can see their complete scan coverage/range. This might be especially useful for Proteus (espionage) but I think it would be useful for tactical planning for NP in general.
(Maybe if you left-click a star you see the individual star’s circles, right-click a star and you see the circles for all stars of that player? Matches nicely with the left/right-click options for messages.)