I've been browsing your stuff for the past few days, and I have to say I'm really impressed. I made some changes to my planning for upcoming game to use your elemental classes as the main arcane orders of the setting, because they fit so exactly with what I wanted them to feel like. Kudos!

One design note...please don't give in to people asking for 20th level capstones. I feel they're one of the worst design flaws in Pathfinder, simply because they're conceptually fun but gameplay irrelevant, as virtually no one plays at 20th level. Put game changing class abilities between 8-12th level, so they can actually get some use!