+ Bounty managers should be the ones to hold on to the project tokens and distribute after bounty ends
This one might be too risky. Because who knows if the bounty managers has any hidden agenda behind it. What if they took off with the participants' payment?
Sure, they could give the managers in charge to manage the distribution, only if that managers has a solid, and good reputation through and through.
They cannot just easily give access to bounty managers about such thing. Whether you get paid or not is another story.