The league systems in each - and particularly to anything approaching what is there now are far younger; England's Division 2 was around by 1891ish, but Spain's proper league didn't start until 1929, and Germany's later still. I'd look at the J League as a model for what promotion and relegation offers; I've seen a lot of J2 games this season and they're exciting because they matter. MLS is not yet big enough in terms of franchises, but if in 10-15 years it's up to 30ish, going to the way England used to do it (voting the worst performing teams in/out) might be worth thinking about. They can always come back. *And yes, I rather dragged this out of the previous page, but figured it was worth doing.