In Smackdown vs Raw 2012, if they let you put Paint Tool designs on the Minitron, and have them animate the same way they do on the character select screen, in addition to the Create-An-Arena function, then I personally couldn't think of anything better.
It would be a godsend. An absolute godsend.
Just throw in the Create-A-Belt back in the game, and it would be perfect. I could literally create a real CXA.