I have given access to many qualified people that asked me privately, some of them intending to find exploits. I understand what you're saying, but I don't think releasing to everyone is wise until the alternate exploit is finished.
It makes sense. While this may not be what people want to hear. Sometimes instant gratification isn't what is needed. Everyone just needs to have some patience. I can see both sides here, but while one side has a real reason for hesitation the other side is primarily guided by impatience and greed. He will release it at the optimum time, unless this community ruins it for themselves.