I agree that to work up a full 'Display' would have involved an inordinate amount of work and supervision in the short time available That said, a Role Demo could certainly have been put together with far less effort. The latter could still be made dynamic and exciting to watch even if not in the category of an aerobatic display.
If BA can put a 744 up to lead a 10-ship formation at a UK air show then the F35 Force certainly missed a trick!