I think it would be an awesome (and fairly easy to implement) feature to be able to organize how you see the champ select screen. For instance, despite the fact that I own approximately 60 champs, I only play about 10 of them regularly. If there was a tab in champ select that when clicked would display only the champs that you use with the greatest frequency, then you wouldn't have to sift through all the pictures to find the champ you want.
Also, if players were able to edit these tabs, much like mastery pages, then you could select 10 champs and put them into a tab called, "Junglers" and then when you are assigned the jungler role, just click the tab and choose your champ.
Just a rough thought, what do you guys think?