Perhaps I am missing something. Within the MVC world, bundling is a way of getting a collection of style sheets, javascript, such to the client in a compressed quicker manner. Using the RadTools style sheet manager it was possible to provide the user with a list of style sheets and allow them to pick a "flavor" for a given page. The style sheet would then magically cause the Telerik controls to then use the currently selected Style Sheet.
While I agree bundling appears to be a good way to get style data to the client, I see nothing in the MVC implementation which provides the ability to use style "x" now, style "y" then, and style "z" then as well.
Again, I might be missing something.