1) Since DKs are currently going to be a little bit shafted in terms of old tier armor to choose from, perhaps the old pre-wrath warrior sets could be changed to be usable by warriors AND DKs. (similar to how the warglaives of azzinoth legendary was changed so that DKs can now use them)
2) If it's going to be possible to place tabards into void storage, fine, but please consider that to be only a temporary stop-gap, not a final resolution to the tabard-storage issue. The final version of tabard storage should be something akin to either the title drop-down menu or the pets / mounts tab. Void storage is slightly better than bank space, but it's not nearly as elegant of a solution as you guys are capable of making.
3) Please create a functionality on the armory site to display all transmogrifiable item models of a given type. We should be able to select "one handed axe" or "leather shoulders", and have it display page after page of relevant models (not just the stats or item tooltips, but the actual in-game models), along with brief notes on where they can be obtained.