This seems to imply that the American revolution would continue and succeed ala OTL. When you consider that many rebel officers were still toasting to the health of King George even in the second year of the war, the idea of a very reasonable compromise isn't so hard to accept.
Sam Adams and his bunch hijacked proceedings long before that, the Generals could always be replaced.
Congress ran the show and they were a self selective group tending towards the more radical end of the spectrum and that was only reinforced over time.
Joseph Galloway for example feared for his safety due to his moderate views and he himself had proposed a power sharing plan (where Congress and Parliament would have equal authority over the colonies) which had been rejected as too soft as early as 1774.
I can't see the rebellion being prevented unless order is restored (one might say created) and people can support the government without fear of reprisal from hired goons and mobs (an effective counter-propaganda war n the governments behalf wouldn't go a miss either).
The best way to get that is to either enforce the Stamp Act (a difficult if not impossible task) or to find another method and enforce that vigorously before opposition can grow and increase in boldness with each British climb down/appeasement.
Remember Franklin didn't switch sides until his family and holdings in America came under threat whilst he was in Britain due to his support (I would say indifference) towards the Stamp Act.