Time constraints and setting up an insane amount of matches because there's two separate key modes makes it difficult to coordinate.
YatsuKaori wrote:MWC Spilt? Not Play together 4K and 7K?
If you check out the statistics of each player from the major countries you'll realise that all four countries that you've listed stand little to no chance to a couple of others. Don't base it off past year's results because there has been significant rule changes compared to last year. There's also many StepMania players who are dominating the 4K scene in multiple areas.
Rori Vidi Veni wrote:4K: Korea, Philipines, Malaysia, Poland