[They never heard of well-organised national parties.]
During Washingtons' administration this is true. Washington was firmly against political parties. But as soon as he left office the Federalist and Anti-Federalist parties formed and the members were framers of the Constitution.
Even before he left office, actually, though they took a few years to consolidate. It's beside the point though, as they only heard of organized national parties
after the constitution was framed.
True. At that time, of course, three states, Massachusetts, Pennsylvania and Virginia, held almost 50% of the US population, a situation that has never occurred again.
No...The majority of the US population does not live in large scities and has never done so. If it went strictly by Popular Vote, everybody's vote has the same weight. It doesn't matter one bit whether you're in the majority in your area or not, so it doesn' teven make any sense (except for us statistics freaks) of talking about a city or state or region voting for a certain candidate.
They were humans. They did a remarkable job, an absolutely extraordinary one given how little examples from elsewhere they could draw on, but not a perfect one. Otherwise there wouldn't be any need for amendments, no clauses that are more or less ignored, no gigantic body of unofficial quasi-constitutional stuff in laws, court decisions and precedent.
I agree that the EC with the small states bonus is better than the EC without it. That would really give too much importance to the major states, and make the small states irrelevant.
But apart from that, we'll just have to agree to disagree on that last paragraph of yours.