I would expect the TCC and the future claims rep are not willing to bet on future payments from BSA. It seems like it would be best from all parties to arrive at a final number, write the check and move on.
For future claims, my understanding is that there would be a bucket of money that would pay out for those claims not submitted by the bankruptcy filing deadline.
I tend to agree with @David CO that parents and donors (and I expect COs) will want to have a hard line in the sand that future dues, fees, fundraising are all going 100% to the current youth activities and not past