Shame that they are, since they're the veterans of sorts. A quick fix on GW's part would be to allow them to take lances, or fight on foot with great weapons. I don't really think that mounted great weapons in fantasy really are representative of what a greatsword or greataxe would do from horseback in reality. From the back of a horse, you've got much better reach than if you were standing. With a greatsword, you'd be able to cleave a couple guys with each stroke if you went about it properly.