I think there are plenty of possible variations. I've been thinking that representatives above a certain threshold actually get seats in the legislature and com

I think there are plenty of possible variations. I've been thinking that representatives above a certain threshold actually get seats in the legislature and committee positions, etc. But any one person would have the freedom to vote on every piece of legislation (if technically possible) if they wanted. In all likelihood, a few people would get most of the votes, because they're competing for attention from a national audience. Therefore, it is possible that local issues get marginalized, so I think it would be necessary to give people multiple votes. That way they can split their vote and choose both national candidates and local candidates. We can debate all these details when we get to the constitutional convention.