I'm having some problems recognizing your POD as good enough.
1. Did George Washington really went to a military parade in New York City in 1786 for him to be shot? He has been in Virginia the whole time before the Philadelphia Convention for all I know.
2. Why is Benjamin Franklin in GW's burial when he is in France? He returned to attend his funeral? But that doesn't matter. Answer question no. 1 first.
3. Why will there be a 1787 Philadelphia Convention if there is no James Madison around to even do the 1786 Annapolis Convention with Alexander Hamilton? We're talking of massive butterflies RIGHT AWAY HERE.
4. If the Constitution was rejected in the Great Convention, why will Adams became President of the United States? How did he got elected? He was chosen by Massachusetts to represent them again in the Confederation Congress? He resigned his position as Minister to England? And if such a Convention failed to produce, it's like... "Ok, it's fine. Let's just have this discredited super failure of a document to govern us."?
5. How did Benjamin Franklin die before the Convention?
6. Without George Washington and James Madison, A LOT OF THINGS WILL HAPPEN. And it WILL NOT INCLUDE a Constitutional Convention IN PHILADELPHIA IN 1787 WITH THOMAS JEFFERSON IN IT! How did Jefferson ended up in the Convention?
7. Did the Annapolis Convention EVEN happened as it is just with no Madison around?
8. The Shay's Rebellion? What happened to it? Did it still happen at August 21, 1786; 11 days after this supposed assassination?
THE POD IS FLAWED. GREAT DECISION. RESTART THIS ONE.
AND LOOK FOR A BETTER POD. THIS ONE IS NOT THAT GOOD ENOUGH FOR ME. PLEASE FIND ANOTHER ONE.
I'M SORRY.
EDIT: But some of your ideas in this TL is really interesting for me, who is creating my own America TL. I really like them. That's what I can give you credit for. (APPROVE!!)