Would it be possible to load deck categories via a midi mapped key? I can't imagine it would be too hard - like a right click on the category to assign a note to it or something similar to assigning notes to effects...
This would make it easy to load 8 new decks on a single stroke. Personally I don't even use my mouse in performance - it's there, but not used simply because I've got everything I use mapped. The only thing i've used it for is loading new decks from the deck browser. (I don't even really have room for free mouse movement on my setup table)