I would like to see a special ability that comes from attuning to an element. Perhaps 525 could be reworked to provide 4 different spells and you cannot cast the spell without being attuned to an element. I haven't thought of what those 4 spells could be, just an idea. A spell that when someone sees you casting it, they are like "oh, they must be a fire mage".

http://i.imgur.com/lsWPzG9.gif