I'd like to suggest making all the panels adjustable (I colored them in the image, not sure if there are more).
I want this feature mostly because I have 2 monitors, and I could really use the space much better if I could rearrange the program panels, but then again I think that this would be useful no matter the amount of monitors a user have.
I cannot maximize the program to 2 monitors, but I can click and drag so it occupies all the space in them, but then the view panel (the one that shows the images) works in a strange way. The view panel is centered in the middle and I cannot adjust that, so it's cut between my 2 monitors:
It would also be neat to be able to move the animation panel to the right so you can see all the layers at once when you have a lot of them (like it happens in the animated bones example).
Maybe you could make that the panels can be undockable/dockable, so we could arrange them with complete freedom.
I hope you like the idea, I think it would be a nice new feature! :)