I think it would solve a lot of issues if there were a set number of fast passes and food reservations available to magic+ customers. The day guest would still be able to experience what they want and the magic+ guests can feel exclusive and cool. I doubt this would happen though since it would diminish the quality of the system they're spending so much on.
I think DLR has a decent amount to make the system at least possible, but I don't imagine it being successful. California is a vastly different place than Florida.