Maybe you should take all the old stuff, remove it from your Featured section, and stick them in their own "old stuff" section. This way people can see how you've improved, while focusing the attention on your newer stuff.
I don't mind the way it is now since in that way it'll show your work you've done chronologically starting from to the very last artwork/masterpiece you've done to the latest you've created which sounds perfect to me. ^_^
Just go through your stuff and organize it into folders. Keep your best deviations in the Featured folder. That way, we see your best work right away, and all your old stuff is still there for reference.
And I'd say no to storing them. When stuff gets stored, no one can see them. And I like a lot of your old art. :'D