My big problem with Arcane Warrior in DA:O was that it didn't really do anything of its own. It just stole roles from Warriors and Mages, did them better, and got all OP to the point where Solo'ing High Dragon on Nightmare was a laugh. (Without using Blind-spot exploit)
I love the idea of a Front-line Mage though, so I'm hoping Knight Enchanter is worked in a lot better than Arcane Warrior was. Plus, the title is way cooler than Arcane Warrior as well.
Spirit Healer/Blood Mage was by far more OP than AW.
I really don't agree with that, in the context of Solo viability. In terms of Party Dynamics, sure Spirit Healer + Blood Mage pretty much made your group invincible.
I didn't experiment too much with that combo though, maybe it does have solo potential that wasn't immediately obvious to me.