The Japanese were ready to surrender, conditionally. But the allies were demanding complete surrender and for religious reasons and fear of war crime punishment the Japanese were very reluctant to do so. If you really thing they were ready to surrender, explain why didn't they after to first bomb to spare Nagasaki? Was demanding complete surrender the right thing to do. In hindsight, with the benefits of the Marshall plan and the present relative properity of Japan. I would have to say yes.

Again, the worrying thing is the present glorification of the event. Enoly Gay should be synonomous with "Never again", not "Look how mighty and clever we are."