Board Thread:Off Topic/@comment-24993958-20160607185611/@comment-25936766-20160609123528

Well, we haven't seen Water Dust itself. Closest we got was Ice Dust and the mention of Steam. So until we finally see a true Water Dust, I'll consider a waterbending Semblance fine. For all we know, Water could be like Glass; can be made by using different Dust types simultaneously, but doesn't have a Dust type of it's own.

Besides, if the water was made with Dust, you would not be able to do what you can do with the Dust Interaction there. Try applying Fire Dust on the Water Dust, you'll get Steam at best, end up with nothing at worst. Try applying Fire Dust to the Water in that Semblance, you get Faux Lava.