Honestly I don't think you should speed up melee speed. Native is too fast (when a server uses the "fastest" melee setting). Normal seems too slow IN A DUEL, but honestly like people are saying, in battle people still die regularly and all the time. You have so many ways to kill, and if you have a teammate with you, instead of a 1v1 that people can manually block indefinitely now you have the chance to dominate them with different swing directions. battle and siege isn't the duel server...so you shouldn't base the overall settings on it.
I like sgt_teeth's suggestion that WM should actually mean something. Right now WM is basically a neglible skill. As someone who uses 2 WPF skills (1h and polearms), the difference between 5 WM and 6 WM is the difference between 120-115 and 115-110 (or something ridiculously close).
Flattening out the curve (some, not all the way) and taking away the WPF on every level would be nice. Or maybe only give WPF every level until you hit level 20 or 25.