You could make a finalised FEP a deliverable. But my concern is that putting FEP facilitators between grantees and their payday could have inintended consequences. Like financially stressed grantees leaning on facilitators to rush to finalisation, undermining both the collaborative spirit and the rigour of the FEP process.
Even an abandoned draft is better than having to reverse-engineer their code. And if both grantee and FEP facilitators were under no pressure to finalise a supplied draft, hopefully most grantees could enjoy the drafting process enough to stick around and see it through.
I would define “draft” in the grant agreement though. I agree there’s no point in a minimum effort braindump that effectively has to be reverse-engineered itself. I just wouldn’t want grant completion to depend on an open-ended community process that grantees can’t (and shouldn’t) control the timing of.