In the current proposal, 'project groups' propose projects to the dev team. The dev team then accepts or rejects them. This means that a load of volunteer time will have been wasted in developing proposals. Those volunteers will be less enthusiastic to continue contributing. Furthermore, those volunteers will be subject to the sunk-cost fallacy and want to continue developing whatever it was that they proposed, so will end up being alienated further.
In the current proposal, 'project groups' propose projects to the dev team. The dev team then accepts or rejects them. This means that a load of volunteer time will have been wasted in developing proposals. Those volunteers will be less enthusiastic to continue contributing. Furthermore, those volunteers will be subject to the sunk-cost fallacy and want to continue developing whatever it was that they proposed, so will end up being alienated further.