I dont quite understand how it’s less easier to manage a category…
So you have Category -> Post but instead you want Page -> Category -> Post
It doesn’t make sense in what you are trying to do.
And and if your trying to link categories into pages just so you can include them in some form of navigation, WP3.0+ has the ability to link categories with Appearance -> Menus.
And you don’t really manage a category you just manage the posts associated to a category.