I use a midi controller to edit my photos in Lightroom. It's really awesome by the way. Here's one feature that would be very useful, convenient, and easy to implement in my opinion. It would be awesome if I could just double click the copy settings shortcut in the develop module (⌘ + shift + c), to open the dialogue box, and with the second press have it copy those settings without having to press a different keystroke such as enter or pressing it directly with the mouse. On the midi controller its especially annoying because I have to go off of the controller to the keyboard to press enter or use the mouse. It's not a drastic change but I believe it would stream line the editing process a bit.