Your R2B picks are fine. Because you haven't actually used RBA - he was only a possible default - he's yours to use as a main pick.
Now that RBA has given walkover do I get eliminated or will my BU be used or can I choose a new pick?
Bu player is your pick
Until the BU match begins, the BU is your main pick. Once the BU match starts, then it's the pick. You can switch the Main pick before the BU match starts, and the backup will only be used in the case that your other pick also withdraws.
R2 BH:
