Currently, the armory URLs in profile pages links to /simple, (e.g. http://us.battle.net/wow/en/character/t ... son/simple
) which if you're logged into battle.net makes that your default option when viewing other armory profiles afterward if you don't change it. If the URL was instead changed to http://us.battle.net/wow/en/character/turalyon/grayson/
, then it would preserve the advanced or simple option that the user has already selected.