Polearm weapons would be an awesome addition. They would obviously have the llongest range of all melee weapons.
Staff
Spear
Naginata
Halberd
Bec de Corbin (or whatever a hammer + spike weapon is)
Lance
I wrote them in what I think is fastest to slowest. For perks:
Thrust passive skill (+20% damage each rank)
Trip (perform a quick maneuver which trips any two legged opponent except Giants)
Disarm (knocks weapon away from opponent)
Blur - passive skill (Move with blinding speed using the entire weapon. Deals X% of weapon damage when successfully blocking an incoming melee attack. 10% at rank 1, 15% rank 2, 20%max rank 3)
Impale (powerful attack that penetrates armor (enemy armor rating reduced 50%)
These are a few ideas I would like to see.
Naginata falls in the "hafted blade" family of polearms.
I would love to see them diferentiate between the traditional spears, pikes, and hafted weapons(halbards and naginatas etc.)
But if they do add polearms I suspect they will have one generic type. Just as they did with two handed weapons.