Showing the coordinates is a great idea. It'll also get a little easier to see where you are when I overlay an encounter grid.
And yeah, eye dropper is good too. I haven't thought too much about advanced features yet, like area selection, copy/paste, flood fill, etc. Eye dropper is one that's super easy to do, though, and requires no new UI to enable. I've been putting UI features off until after I can edit all the game's maps, but these two are quick enough to do, and useful enough that they might come sooner. :)