The gods handle divinity as a mere game of thrones, there is nothing making me feel as if the divine are any different than a court of political sorcerers.
One man's trash is another man's treasure, and all that, innit? This was a STRONG point to me. I'm actually surprised to see you bagging on this since you seem to dislike the typical fantasy tropes so stop me if you've heard this one before.
You start in humble beginnings but turn out to be the superultradivinesupreme! (Baldur's Gate 2:Throne of Bhaal, Skyrim, etc etc etc.)
The fact that the "gods" appear to be simply beings at a somewhat higher elevation in power but with a very Greek pantheon sort of human fallibility is quite refreshing. They are petty, jealous, petulant, and well, act very mortal. This is a nice change from the "FULFILL YOUR DESTINY CHOSEN ONE" that I've played in a dozen RPGs over the last decade or so.
The Game of Thrones posturing is a net positive, not a net negative, but YMMV of course.
Mechanically, you are pretty on point and wizards outclassing fighters especially at higher levels has been a problem since the 1st edition of D&D back in the late 70s. There is only so much you can do with a sword vs. the ability to call down thunderbolts like Thor himself. *shrug*