Their reputation will take a bigger hit if they kill the two passengers than it would if they hire SpaceX to bring the humans home.
If NASA was smart, they'd tell Boeing to hire SpaceX and to bring the Boeing craft back empty. If Boeing makes a safe return on the test flight, continue to throw good money after bad; if not, cancel the contract.
But NASA has shown poor decision making skills since they got rid of the Nazis.
Let the astronauts vote on it.
If they split one to one force them to stay there.
:-)
One of NASA’s problems was it adopted every project management fad that came out of academic MBA-land. Another problem and it compounded with the management fads was Congresscriiters\Senators using NASA as a jobs program. Glenn was among the worst at doing that.