The best use for the space would be to promote upcoming or current Disney movies. In the past year, they should've used it to promote Tron, Prince Of Persia and Sorcerer's Apprentice.
They could also use the courtyard out front for additional props and displays. Not only could it be a promotion tool but, if done right, could be an incredible revolving attraction.
As for ElecTRONica, a perfect place for that would be New York Street. You could add additional street carts along the street for serving alcohol. Flynn's Arcade would be great in the current Monster's Inc. meet and greet location (move the monsters m&g out front by the bathrooms where they do the Darth Vader m&g or in the area between Soundstage One and the Backlot Tour). To me, ElecTRONica would be an amazing addition.