Default Runes/Masteries.

Just an Idea.

Basically, in the runes/masteries page, you will have the option to set 'Default AD' and 'Default AP' on two of your sets. Then when you select either an AP or AD champion in select, your chosen defaults will automatically be selected. You would still be able to change masteries/runes at any time during champ select as normal, however. The feature just means that you don't forget to switch. :)