I understand why the Battlemaster's might need the universal token seein as you only get two bags per the weeklies, but why no love for the Champion tier?
If you're going to go ahead and take the time to make the fifties bracket and catter to the Battlemaster's go ahead and make the same token for the Champions, they aren't the only group facing the problem with duplicate tokens. Adding the token doesn't defeat anything except that you now need them to purchase the pieces.
They still have the same rare drop as a token might but at least you won't get three bracer tokens back to back or have to cross your fingers as you open a bag and hope it isn't another set of boots of leg tokens.