ROFL
Well, a 2nd manager can set a illegal formation if have a bad day (or nope lol) so, to prevent I guess the way is more or less do it like I suggest... a option to do a mutual management of teams maybe is something that many pople prefeer not to do... and well... Khris can do it well as manager for your team but in your turn you can screw me later and then what? xD
As said, and IMO as managr, is a good suggestion, not my personal primary option that should be implemented, but one good.