I'm expecting less. Stereotypical wizard characters are typically more effective as combat artillery, firing from the rear. But 17% smaller party size suggests it'll be much harder to form a line, making battles more likely to be a bunch of random, boring, individual skirmishes, as in DA:O. The combat demo we saw with the sand creatures confirmed that in my mind. Hence, a multi-class, melee-capable wizard would make more sense than a pure wizard.
But that impression may change once I start playing the game.