User blog comment:Omnirock/Dark Bard's Journal/@comment-5760872-20130506170202/@comment-8706772-20130506194220

Perhaps different runes giving each of these "adjectives" that can be applied to any weapon? Adding a second rune overwrites the first.

Nimble: -5% dmg, +10% attack speed

Heavy: ...

etc, etc..

Could also have elemental runes, adding different elemental damage. I like the idea of modifying the weapons to make more unique builds.