It does seem pretty useless, though it does help scale up the damage of any abilities you have, I think. Right now I guess if a non dagger 1 hand weapon gives you a better damage total on your character sheet I can't see any reason to not use it instead of a dagger.
Tbh I hope they fix this. Some scoundrel lovers are still saying they are good but the base damage on a two handed weapon is easily the same as the crit damage on a single dagger, so I'm not quite sure what the point of daggers is except to use the dagger skills because it's more work to maneuver into a backstab position without getting ganked than it is to walk up and start smacking away with a 2 handed weapon.
Going to mess around with the class a bit in my next party, maybe I'll find I'm wrong altogether.