Having the ability to move your view around the "canvas" (similar to the hand tool in photoshop) would be super useful. Right now the only way to adjust your view is to center everything, but for people who are making something that is horizontally tall rather than square that doesn't help, since it will take your focus window away from the face of your character and move it to the torso. Being able to zoom in and move around freely to the part you're working on would make things so much easier. A different way to achieve this would be allowing users to select all layers to move everything around together at the same time, rather than needing to individually reposition every layer.
Love this program btw. I'm having a lot of fun with it, and it has so much potential. Can't wait to see where it goes! :)