Sorry if i offended you with that one, but thats not quite what i meant.
It would obviously be a problem to have 20+drivers all competing for the same league, but in 2 seperate races (in case of over subscription), ny idea was to split it down the middle, but like you say, it's not easy or nice to decide who goes in which server.
I did just have another thought: it's a crazy one but it might just work!
A rolling league, simply count the results for the last 5 races only, and declare a new 'top dog' at the end of each race. that way there's no worries about having to sign-up for the league etc. it's all about being consistent (at least , for 5 races at a time) and it could all be as casual as before (a very important point), i'm sure it would work out nicely if the servers are split into fast/slow or something, but that brings up the above issue.
it would be nice to see a good, friendly (very important) enduro league going, and it's not something that has to ruin the character of the races, but something like the rolling league system would be a much more casual way of running things and allows everybody a chance to win it, and enjoy doing so.
But i suppose it could all be seperate, but that's a shitload more work for franky