Thank you both for replying. So, I got a hold of this screenshot of the Wardrobe interface:
It shows the one Warlock tier chest and the two existing lookalikes under one single "look".
My theory/hope was that once you unlocked the "look" (which could be done with the tier as well), it unlocked the whole thing... so as long as there was an item on that list without class restrictions, you could transmog that "look" on any character with that armor proficiency. It would be, basically, as if you collected
all the items listed under the "look". Are you saying it does
not work like that?
If so, if you have collected the Robes of Thousandfold Hells, will the item tooltip let you know you didn't collect the appearance when, say, Robes of Mutagenic Blood drops? Or will it say you did, because they are technically the same "look"? It could create confusion.
Personally, I would like tier to unlock everything, because otherwise lookalikes become implicitly more valuable on mog runs. Before, I would pass on lookalikes for my class armor, because I knew I could get the tier much easier, but this way you will always be encouraged to roll on lookalikes simply because they unlock the "look" to a wider range of characters.