It's a good idea and they SHOULD let guild officers have more management of player teams, characters, deployable GP in TB and TW. But, they don't want to let players have control of other players roster. (Though, they're fine with 12 mil GP players manhandling other players in GAC that have 2 mil GP I guess.)
One of the things about MSF in their version of TW was that you built the teams and the guild leadership would move it around for defense in the best place possible. I feel like they could do that because players still build their defensive teams, but guild leaders get to place them on defense. (Though TW is still lame and boring because they haven't done anything with it for 4 years, so it needs an update and upgrade.)