Just to make sure we're clear, this is just speculation.
Remember the data mined top hat from ages ago? Remember the rivets it required? They're grey vendor trash on the PTR.
So unless the recipe has changed, and we haven't found it yet, I'm assuming that means no more top hats. Sad day.
Also, void storage is currently expensive as hell. 1k to open, 100g per item, and it's not even linked to the transmogrify NPC. You have to take items out to use them. Transmog isn't too bad, I think a full set cost me about 250g? Meh.