To be fair, Brown did seem to be saying it in jest. And yeah, the orcs in LOTR are mostly pawns of Sauron or Saruman, but as others have already said, that's how they are intended. Many of them DO have personalities, however; although it's true that we don't spend a lot of time with them, we do get frequent looks into their savagery.
Now, I understand that Warcraft is trying to do something different here by having good and evil orcs and all that. And I sincerely DO hope they pull it off. But it can't be denied (at this point at least) that the footage we've seen so far has disappointed a lot of people. If the next trailer hits and it's met with the same response as the first one, and then some bad reviews hit later, it wouldn't surprise me if the studios will start throwing out TV spots with comments by little-known critics saying things like "MORE MAGICAL THAN LORD OF THE RINGS!" and "MORE AMAZING THAN STAR WARS!".
Again, I know that's NOT really what Clancy Brown was doing here, but if this movie does indeed turn out bad, I can see them going that route.