Lovely idea, clearly more realistic than the previous one.
Other than the camping rule which is a requirement if you want your tournament to be successful, I hope we'll see other captains and players than in the previous NWWCs based on a groupfighting format. Undoubtedly, some of the best players in the current groupfightings fully deserve to be among the national teams of such event, but this is clearly the occasion for smart, disciplined and experienced players - who couldn't qualify for the previous NWWCs because they are not considered as part of the 'top' in melee - to get a chance to prove their worth among a different format who isn't based on melee only within a closed arena.
Bring in some diversity if you want to keep what's left of this scene somewhat alive.