You just have to put in a Vector Pen tool (but please don't mess with the other natural tools) and I think a much improved pencil tool would be great too!!! It just doesn't work well as it is and the line quality doesn't seem as smooth as it should be. A really good vector pen or brush tool with the ability to taper the lines would be so great!!! Really,..other than this,..I cannot see much more but perhaps a few additional art tools...or settings. All in all,..a great app.