I think the pages that list the stages of particular stage themes should be replaced, and instead we should orginize the stages into catergories, such as classifying forest stages in a "Forest Theme" category.
I think it's very unorganized to just list stage themes on one page. It's like if we took all the rings and listed them on one page rather than categorizing them
Even if we did keep the pages, categories should still be used. There are more than enough stages for each category to warrant them getting categories. If you look, there is category for sheilds yet there is also a page that lists all the sheilds. If this is the case with sheilds, why can't this be the case with stage themes? To have a page that lists them, and categorize them as well. Although I would prefer to simply put them in categories and get rid of the pages.
I really see no reason why this shouldn't be done.