It's a shame that it was only a bug of the WoWhead preview ability, but I really would have loved if Dracthyr (and trashgnomes to be fair) had the ability to mog pants and gloves in such a way that only the 3D elements were shown. Same for the chest piece for Dracthyr.
It would probably look horrible for most pieces, and it might be a nightmare to program, but it would be something.