I know some of them are mentioned before, but give my complete list anyway:
1. Allow start of crop to be outside image area. Makes it much faster to crop full width for example.
2. Save crop area too, with crop ratio. And also apply that to the next image as default if you select crop.
3. Rotate crop.
4. Speed up drawing of the crop box. Seems quite slow now. (72Mb 16bit BW TIFF files used if that matters)
5. Allow change of opacity outside crop area. I want it much darker.
6. Allow a bigger "drag area" around the crop corners. Now its far too easy to click just outside and thus remove the crop.
Rgds
PM