I'm not particularly interested in national identity actually, I just don't see how it could be done differently. How do you implement a population-based method? I mean, if we're not going to care about nationality, what are these populations that we're basing it on? You could base it on city instead of country, but that has several problems (like, what's a "city"), and also just shifts the issue since it's still regional, in essence the same as national.
Are you saying countries should be able to send a number of "representatives" based on their populations? Then we have to look at the whole world and see how much of the world population is each country's population. India and China would get a lot of delegates. So that we don't get a situation where many countries aren't allowed a single delegate, I guess we have to set the minimum to 1, meaning fairness eludes us anyway. I assume China and India never participated (maybe nobody there plays Dominion), but we have to factor in the possibility.
Or are you saying we just let the Dominion activity decide, so that if a country holds a bunch of tournaments, they should get more people in the championship? This would be an incentive for people to just hold a bunch of tournaments then. I guess we could have a rule that each person can only participate in one tournament, but it would be impossible to enforce unless we have a central register and require every organizer to submit a full list of participants, in any case a lot of work.