Interesting topic and curious to see what others think. This is probably a place where the letter of the law (ultimate discretion and control over an internal program or restricted fund) and the spirit of the law (collaborative ownership/operations) diverge.
My non-lawyer take on it all:
The countersigner to the FSA is not the project for a reason this attorney said. The project (Model A) or Restricted Fund (Model C) is really just an internal program/fund of the Sponsor and as such cannot sign a contract… Just like a Marketing Department could not sign a contract with the Accounting Department, they are both the same org - just different depts/programs.
Our countersigner for Model A is an Individual as a Project Founder or an unincorporated nonprofit association (to represent a founding group of people) and in Model C it is the Grantee - All exist outside of us as the Sponsor as their own “entity”. The FSA is stating that the Sponsor has established a Project or Restricted Fund and that a Project Founder wishes to have delegated authority to manage that program. I feel like that countersigner is essentially accepting delegated authority to do certain tasks in support of the project and the Sponsor is making certain commitments to support the purpose of the project via various administrative functions (HR, Finance, re-granting, etc).
In termination, I could see an argument that the countersigner is essentially terminating their delegated authority, not really terminating the project and in all reality is not forcing the Sponsor to do anything… since the Sponsor owns the Project and holds ultimate discretion over its operations and assets
All that said - I would agree that in all reality an FSA is pretty one sided to protect the Sponsor and the Sponsor hold ultimate control, ownership, and discretion (just like it also holds all risk) associated with the project activities/assets.