aw, come on guys… why reinvent the wheel 
Qt is multiplatform. Pencil2d’s interface is nice as is. There are other more important features worth making useable instead of redoing the gui.
For example the pen tool on vector layers is horrible with that automatic line bending to get glued to other lines.
Look , I even made a video to demonstrate the problem:
Can you make it so the user can disable that behavior?
And glue a line to another line only if it has crossed it.
Also the bucket tool is not very consistent right now- with vector layers. Some times it does not create a fill at all. When I zoom in and out for a while and try again- it does.
I am saying this because if those two werent kind of broken, pencil would have been great for doing animation for a 2d video game I am working on right now!
Vectors means:
-I can readjust color palettes and reuse enemy sprites with different colors.
- I can readjust line thickness to get it to look right on a specific resolution
- I get very crispy lines
Instead of remaking the interface or removing key selling features, why not polish what we’ve got a little bit more. It is truly great!