I know there was a similar thread knocking around recently, but my search-fu is weak and I think they were talking about a different issue in any case. Basically, what I was thinking of doing here was using some of the principals behind ranged weapon penalties and transferring them to melee weapons. Mainly because in some cases (two-handed weapons in general), there don't seem to be any rules at all, while in others (two-handed weapons such as the Spear) it's because they have been widely utilized one-handed in real life. I've put down my thoughts using the template below:
Ranged Category -> Melee Category: Rules listed here.
Examples of Melee weapons.
Please tell me your thoughts on these optional rules.
Pistol -> One-Handed: Requires one hand to use.
Sword, Chain-axe, Witch Lance.
Hand Cannon -> Adaptable: -10 to BS/WS when using one-handed unless you have a Strength Bonus of 4+.
Spear, Flail, Long-Sabre, Power Longsword.
Basic -> Two-Handed: -20 to BS/WS when using one-handed.
Great Weapon, Eviscerator, Thunder Hammer.
Recoil Gloves: Allows all non-Heavy weapons to be used one-handed without penalty.