Not sure how up to date the new wiki stuff will be for the release, but there's already a bunch of nerfs to common systems so shouldn't be as easy even on normal. From a quick(as in I spent the last 2hours comparing the old and new wikis and shit), Glass Cannon was nerfed to only give +4AP per turn rather than double what you had which I think makes it better early(possibly) but worse later on, Lone Wolf was surprisingly buffed to give 2AP per turn instead of 1 and a bit more health however they're now both incompatible(so you can't pick them both on a char). Backstab and Guerilla were nerfed, I assume to reduce the melee rogue output with stealth attack backstab spam. Leech was also made incompatible with Comeback Kid to prevent the quasi invulnerability nonsense(since you couldn't get killed in one hit and leech healed you from the blood lost making Comeback Kid able to proc again right away).
There were A LOT of skill changes also. A lot of shit was moved around, nerfed or removed in the most OP stuff(for example Absorb the Elements is now a Marksmanship mid tier skill self buff rather than the Witchcraft OP buff you could put on your warriors to make them semi immortal). Scoundrel seems to have gotten massive damage % buffs on every of their skills as well as base 100% chance to hit on most status, so putting points in Scoundrel and using skills for a melee rogue seems more viable than the previous "spam autoattack+stealth, 1pt scoundrel to unlock backstab".
On the 2H warrior side, several nerfs such as Rage now having the original armor reduction that was bugged in the original and a longer cooldown, the damage stance giving -20% chance to hit instead of -10% and losing 5%dmg(but doesn't cost additional AP to use stuff with it on) and apparently a nerf at some point in the game to prevent Rage and Oath to stack and also lost the massive Nullify Resistance shout that made it so you'd hit for 100% damage. Meanwhile however a lot of skills seem to lend themselves to 1H+shield tanking style with a reflect damage stance and a weirdly missing from the original Taunt shout.
Mages have too many changes to list, but a bunch of the skills changed schools to other categories(for example Become Air is now a Scoundrel skill, which makes mages squishier) and the most OP ones were nerfed or flat out removed(Magma Orb that would let you create magma and instantly kill most trash due to shit AI for example).
Not too sure what to make for my team now, but it sure looks more interesting than the old shit. New and old wiki:
http://divinityoriginalsin.wiki.fextralife.com/
Divinity: Original Sin -DivinityWiki - Wikia