Just a thought, but a quick way to tremendously bolster the number of Armatars. The quest icons for each game could be used as Armatars. Even better if you have to unlock them to use them. The selection right now needs fresh meat.
I think that's why we have art contests. The winners get a merit and their art made available to use as other armatars. It changed all the time.
Though, you're right about the selection needing new armatars. I think that's what happens when legacy armatars are unavailable (like mine) and when the ranking system goes away. Used to be that every time you ranked up through AP (armor points), you would get a new set of armatars to choose from.