Athasian Wizard

Hi there,
I wrote some rules for Athasian Wizard (D&D 5ed.) and I would like to get some feedback.

Thanks.

PDF: https://drive.google.com/file/d/0B4w6MaHtm7XmSHYxLVhuYWdxYms/view?usp=sharing
ODT: https://docs.google.com/document/d/1GkefGHuJRO8PW6QN_w-WKszGCSmDUe-JBQt5wsT_jOo/edit?usp=sharing

I would recommend keeping it simple. I just let the Wizard use Sorcerer metamagic (and I scrapped the Sorcerer). Preservers got Careful Spell, Subtle Spell, etc. Defilers got Twin Spell, Empower, etc. So, Defilers get more power. Preservers use magic more carefully. Done. Easy.