Damage Increase from Dexterity: 500%
Damage Increase from Skills: 20%
Seems to imply that Steady Aim is just similar to +20dex, not 500% DPS * 1.2 but 520% base dps. Quite a difference. If this is really the case, this passive isn't nearly as critical as it seemed before. 20% more base damage doesn't mean a whole lot later on when you have +70% dmg from +70dex on items. And that's just level 30ish, it'll drop off more and more as the amount of dex increases.