Nah the belts don't need to be split. It makes it more important to have 1 World Champion. Also the WWE doesn't have the depth to have 2 World titles. They have to regrow the main event roster and build it up.
Its why talk is 2 guys will be pulled up from NXT soon. They can build on veterans like Lashley , AJ , Owens and Rollins with newer ones.