Lightroom Desktop: Drag and drop folder opening happens too fast.
When hovering over a folder with something to drop in it, the folders open too fast. You might drag something past them, and all your folders will open. I think 1500ms - 2000ms would probably work better for the open time. More like what Apple does in Finder. As it is, it just gets in the way. I don't think 1.5s - 2s will cause any frustrating delay, but it will certainly avoid the frustration of extra folders dropping down that you didn't want to open.