Board Thread:General Discussion/@comment-25266931-20141008020212/@comment-24198837-20141028043148

Nah, Weiss is still the most versitile. Dust as a primary weapon (As Ruby and Blake would only be using it as a supplement) is, for one, insanely powerful. Weiss makes massive walls if ice capable of holding down Giant Nevermores and fire capable of burning down half a forest. And she has that power level for all dust types, presumably.

Secondly, she's more of a support-type character anyway. Usually, she uses her dust/Semblance to buff the team - Players and Pieces shows this slightly, it's evident on multiple occasions during the Mech fight, and, recently, Blake can attribute her win in No Brakes to the dust Weiss gave her.

So even if everyone else starts using dust (which they should), Weiss is still the team's main dust user, and will be the most skilled and most powerful with it.

Look at it this way - Blake's the rouge, Yang's the barbarian, Ruby's the paladin, and Weiss is the mage. Although nothing's stopping the other classes from using magic and the Rouge and the Paladin often will, the Mage is always the best and most powerful magic user in the group, being the only one devoted to purely magic.