I think it is much more likely BRD losing Internal Release since it helps out much more with Blood Letter procs. Yes B4B does help out our dmg but I tend to use Internal Release and gain the better benefits of my dots criting and resetting Blood Letter in all instants where as B4B there are some points you do not want to use it because of the increased incoming dmg.
BRD will still be very useful in groups. There wont be a need for more than one, as opposed to what everyone things atm. It all boils down to who would rather play a RNG (Ranger for those who dont know) type class as opposed to an actual BRD.