What has changed is that they are better than in Oblivion, I've read that a lot of times. I don't think they should neglect an entire weapon style just because there are new weapon styles. Shield and Sword isn't very new but it has been shown more than two-handed weapons. Sure, shields can bash now but so can two-handed weapons.
They were showing off finishing move animations and spell animations in this video and they didn't even show a single two-handed weapon. Makes me think that the two handers don't have nice finishing moves or something.
Let me do it real simple.
Car Dealer: Heres our old car, what we've done is paint it a different color and we made the brakes better, OR would you like to see our whole new sportscar? Its based on the old ones but they are so much more! Oh, we could also show you this old car, but again, completely revamped!
Did you get the point? New stuff sells better instead of showing the same old same old.
Still dont understand? Then youre simply not clever enough Im afraid.