Don Rodrigo’s Band is going to be added in phase 5 since this object was originally put in the game during patch 1.9 (Ahn’Quiraj patch)
Don Julio’s band was added now because it was originally put in the game during patch 1.5 (Battlegrounds Patch)
Also, this was already announce by the devs in April when they talked about how they were going to manage out itemization
You can read the all thing by yourselves clicking on Kaivax post