Yes, live preview of cropped pixel size would be nice. Also, please consider making the dialog boxes for (exact) crop ratio so that numbers can be entered directly, instead of clicking the little up and down arrows. Especially when I need exact ratio for a magazine cover it gets really tedious clicking 56 times the up arrow...
Consider also, if possible, that the crop could be started by mouse cursor outside the image area (with it automatically being constrained to just image area), so one can do really quick from one corner crops. The way it is now, that crop by mouse dragging must be started inside image, it's a bit tedious to position the cursor exactly in the corner or notice if one is losing few pixels there or not.
Thank you for consideration, Frantisek