Would be nice to see double round-robin where best 4 teams go thru and play vs other 4 best
E.g. Two groups, on of 6 teams and the other with 7 teams. After round-robin, 4 best teams of each group face another groups 4 best teams. Results of 1st round should be carried to 2nd round.
Sepak Takraw Switzerland commented
We create a multi stage tournament for it's grouped round robin as a qualification, which ends after first stage, brackets aren't played. And then add first teams to next tournament together with placed teams.