Cropping can be tedious when doing a lot of photos in a row. I use 2-finger drag and BetterTouchTool to make it quicker, but I had an idea - maybe there's a way to do it now, or maybe it needs implemented. But for Control Surfaces (I use a Loupedeck CT currently), imagine if you went into crop, then instead of reaching for the mouse or touchpad, you could use only dials. For example, one dial to bring the upper right corner in or out, and another dial for the lower left. With those two dials, you can quickly crop most photos. If fine-tuning is needed, you can use a 3rd dial to slide the whole crop left or right, and a 4th for up or down.
Of course, I'm thinking of fixed-ratio crops here... if the ratio is unlocked, this wouldn't work. But... maybe we have it locked, but then two additional knobs, could adjust height and width independently even when locked (if the user has enabled the feature). That would be a total of 6 knobs, which coincidentally is how many the Loupedeck CT has (not counting the big knob, which could be used for rotate, or switching between preset ratios, etc.)