I played a little bit of Oblvion recently and noticed something while fighting a lot. Blocking is good, but it's not need in melee situations. You can move backwards when they attack, which i did a lot. The only time i used my shield was when an archer was shooting at me. This is the only weakness i see with dual wielding. (spells hit you no matter what IIRC). It's easy to avoid a lot of hits. Surely you will be hit a lot, but not continueously. When i noticed this, i counted how many times a melee enemy hit me while i tried dodging. Basically, he hit me 1 out of 5 strikes. Most of those were power hits. Remember you have double the damage, so fight cautiously, dodging hits. Dual wielding is still a great way to fight the way i see it. Just those damn archers.
So.... something we won't be able to do in Skyrim will be okay because we can instead do something else that we won't be able to do in Skyrim?
I don't know if you missed it OP, but dodging is gone, backstepping speed has been reduced and the only direction movement speed can go from the default is slower.
In the run-up to TES VI, Beth is going to be apologizing for dual wielding.