Couple more thoughts:
I do have to agree that many metal window tiled over each other certainly wouldn't look the best. I hadn't considered many windows being open at once. And I think adding an easier way to access the more minor editors (PICT, RLE, STR#, etc) would definetely be a welcome addition.
One other thing I wanted to point out that doesn't seem to have been mentioned yet is adding probability totals like that in NovaTools to Fleets and in the future, Systems; instead of just warning you that the probability doesn't add up to 100%. It's definetly helpful to have your total right there, staring at you.
------------------
I used to jog but the ice kept falling out of my glass.