Like with the brush and eraser tool, smoothing with the smidge tool would be great. I use the smudge tool with my stylus to help create, modify, and refine hair. having the ability to adjust smoothing as I'm dragging out strands of hair or fur would be a great feature. As it is now I have to keep undoing my last smudge because the smudge is just not right. This would also be nice on the dodge and burn tools as well.