I tried to find a way to swap manager and co-manager. There is no way. The only way to do this is to invite the co-manager (Transfer team), and then add back the original manager as co-manager. Ideally a swap of manager / co manager would be great. This is even more painful the manager being transferred FROM is the commissioner. Imagine we have:
1. Team A managed by the commish, who wants to transfer ownership to someone else.
2. Transfer cannot be done directly because COMMISH NEEDS TO MANAGE A TEAM IN THIS LEAGUE.
3. Find some other user to help, Team B. The manager there needs to invite commish to Co-manage. THE COMMISH CANNOT ADD CO-MANGERS DIRECTLY.
4. Team B finally gets co-manager invite sent
5. Team A can finally be transferred
6. Optional - Team A can then INVITE COMMISH BACK as co-manager
7. Optional - Once Team A has COMMISH BACK, Team B can rescind the co-manager position.
That is a lot of pain when a simple swap could have sufficed.

Commissioners MUST also manage in the league. This is not ideal when dealing with large groups that we split into (in our case, 4) leagues. Ideally I could just be a commish without having to be a co-manager. Adam Silver, Jerry west do not manage teams, I really cannot come up with a reason why this MUST be the case.

Commissioners should be allowed to assign co-managers as well. Co-management is buried under 3 layers of menus, and ONLY available to the manager of the team. Commissioners can already transfer teams, why can't they also assign co-managers?