Valotian
OG
The BoA gear will be the worst gear for PvP, as their item level is at 24, which is extremely low.
Armory doesn't properly scale the Ilvl as it does ingame.
With the current information we have available, this is the case.
I still believe that they would like to put PvP strongbox gear into low-level battlegrounds, but I am not sure as to whether or not they will go through with it.
They wanted to put them in during Draenor, but it was (and still is) a low priority item that was subsequently cut, which may be the case again for this expansion.