Thank you for good information.
But I would like to make one suggestion for faster battle matching.
The current system, when I checked,

1. the rules are decided.
2. the matching for user.

Matching is not easy in the upper league because the rules are different now.
Therefore, I would like to propose changing the mechanism

1. the matching for user.
2. the rules are decided.
   (There is no difference for the user who plays.)