I really like the combat system. Like you said, being able to switch weapons in combat, which also gives the possibility to play a lot of different styles, since this also means you will be able to use different skills.
On another note, did you know that if you heavy attack an enemy from behind it knocks them down? So when the shield enemies or Clannfears do their charge, you can heavy them from behind for the game-altering knockdown.
I wish I had noticed that during the first Mage's Guild quest...