To be fair I don't think either of BLM's two AF sets have been Robes as is. They're both coats. Its not a robe unless it covered front and back and goes down to your toes. Not unless people want to say I wear a robe in cold weather when I leave my house, rather than a coat. Even Summoner hasn't really had a Robe either.

Look at the current Shire Gear. Looks more like a Red Mage's outfit than a BLM or a SMN, and RDM isn't even playable yet.