I wouldn't mind seeing halberds implemented. I actually have one of those that I've used in martial arts, and it comes close to the type of weapon you are describing, Knightspark. It's close to 6 ft [2 meters?] long and has a spearhead on one end, with a curved, blunted blade perpendicular to the shaft, as well as a slightly weighted base. The only problem with weighting the base like a mace is that it will throw off the balance of the weapon and make it difficult to use. With bladed longer weapons, you want them to be a bit top-heavy, to add momentum, not evenly balanced or bottom heavy, at least in my experience.
I agree though, that it might be nice in the future to see weapons that are part of the culture of the individual races.
And as for throwing knives... some of us already RP those...