Yes yes and yes again.
Thieves need to be sneaky right? What the heck would it look like with a thief picking someone's pocket while the warhammer they hold is clanking about?
Daggers only for the thief, this would make such nice weapons as the FiD, ID, and Inferno dagger a much sought after weapon for all thieves.
For the warrior such weapons as the darkflame, inferno, diamond force and blood sabers are worth having.
and i guess the barbs could be left with the waraxe, warhammers and the broadsword since those are the heavy looking weapons.