This is my first real post so apologies if this topic has been done to death already. I have been bothered in this game by the fact it is not possible to wield just a sword and have your off hand free effectively. Especially as the female elf in the original trailers looks to be using that style. After playing the game for a while I have had a few ideas as how to implement this.
I believe that adding a new one handed weapon such as a "rune" or "prayer beads" which is equipped in the off hand instead of a shield would be the simplest way to bring in this skill and then have a separate skill tree that levels up when you have the rune equipped. The skills could focus on providing buffs such as increase wep/spell damage or they could provide cc abilities and ranged dps moves.
There are a few ways the runes could be used for example they could mimic the destro staff and have a shock, frost and flame runs which effects the appearance and effects of the spells or they could use poison/disease to make them a whole different style. I have also considered they could have a health, stamina and magicka runes which effects the way the spells work maybe for example have a skill "rune aura" which provides a damage shield with health rune, a spell crit aura similar to the dk flames for the magicka one and a weapon damage buff for the stamina rune.
Its just an idea and obviously would need a lot more development but it's an idea I would love to see implemented in game. What do you all think?