@Imbecile: I don't follow... If you dual wield, you sacrifice defense to gain attack. If you use a shield, you sacrifice attack to gain defense. If you always use a shield, your shield skill will constantly be leveling up, adding to your defense rating, absorbing more damage, and increasing the likelihood of stunning enemies with a shield bash. The Shield skill would affect all of these things, and if you choose not to raise it, your defense will suffer greatly...
I would be quite surprised not to see a Block/Shield skill in the game, because it seems like they tried to make shields a bit more dynamic and practical in this game, and there were variants of that skill in both Oblivion and Morrowind.
I guess I should explain better. Character A dual wields, whereas character B goes for single weapon combat. Assuming they both level up these skills, player A has a clear advantage. The main benefit of a single weapon is that you can also block, but in order to this you need to use a valuable skill slot. Essentially to dual wield you need to level 1 skill, but to go for the sword and shield option, you need to level 2 skills, which makes the dual wielding option the obvious winner, unless the shield option is superior in some way. I dont't want to lose the block skill, and I cant see it being ditched, but I'm struggling to imagine how the skill options will be presented without being unbalanced.
Is that making sense?
Edit: Ah, I forget that you dont have major and minor skills anymore. That might mean that this doesn't matter.