I think a throwing weapon perk tree should be added, with one side for light throwing weapons such as throwing stars and throwing daggers, and the other side for larger ones such as throwing spears and javelins.
These additions would make ranged combat a lot more interesting, with throwing knives/stars for weak and fast attacking, archery for the middle ground, and throwing spears for powerful yet slow and inaccurate attacks.
A cool perk for this tree could let you do a power attack with throwing knives or stars that let you throw two at once, or a dual wield power attack which would let you throw out a fan of knives.