[MegaBlues]

You could use your feet as well. New talent path, Quad-Limb Combat.

On a more serious note, what stands out from Fern's suggestion is that unlike the current Two-Hand, they are all flat bonuses, aside from the Tome section, which would probably be better as a flat FP reduction anyway.

Percentage-based boosts have always been overtuned, and the easiest way to fix Two-Hand would be to make it a flat bonus to SWA based on SR, rather than a percentage based buff.