That’s a great idea. Although I’d rather just be able to drag and edit the curve of the fade like you can with just about every other DAW. Crossfade editors are nice and all. Manually editing the crossfade is better IMHO.
But for a compromise to your point, do you have a key command assigned to the fade editor? It’ll work for the crossfade editor as well. It’s an extra click or two to close the current fade editor before selecting a new event and reopening the fade editor, but it’s not really that bad.