Add this crop feature please

When cropping tight into a photos, and you just want to move in a tad more...your brain is holding all the visual info you're seeing right now in it's creative side...but as you click the crop tool again in order to activate moving said crop, boom, the composition trance you were just in explodes as the entire huge full frame image is dumped back on your screen, and the tiny crop is a teeny thing inside that, and your mental workflow is SHOT. 

No, segueing into photoshops superior crop tool is NOT a solution. I don’t want to create more than one file on my hard drive. Bad/mess/mind-bending hassle down the line when managing thousands of files and trying to figure out which is the right original/version.