Btw for bored people, this wiki
http://divinityoriginalsin.wiki.fextralife.com/ seems to have EE changes, at least some of them(not sure how accurate the stuff will be compared to the version we're getting though) specifically for character stuff(the crafting is not updated for example). You can compare with
http://divinity.wikia.com/wiki/Divinity:_Original_Sin which is the old wiki and see a lot of differences.
Notably, Lone Wolf(which was buffed) and Glass Cannon(which was nerfed) cannot be taken at the same time, nor can Leech and Comeback Kid(broken combo making chars almost immortal).
Backstab and Guerilla seem to have been nerfed putting more emphasis on Scoundrel skills for damage, all of which have been massively buffed in both damage(generally most skills are 100%weapon dmg when they used to be 30 or 60) and application of status effect(most are 100% instead of 70%).
Tank warriors have received a good amount of new skills to let them do their jobs, including a very potent Taunt shout and a reflect damage stance, while 2H warriors have gotten a bunch of nerfs to get their damage back in line I assume.
Mages have a ton of changes, though Fire didn't change much other than an obvious nerf by removing Magma Orb which was fairly broken(though it was so late in the game it wasn't too much of an issue).
Archers got some buffs I think but I didn't play one so I didn't really look into it. Notably though the talent to get special arrows back is 33% instead of 20% so that's something.