[Option Teammate control to team games.]
When you're playing a team game and you are leaving for something you may not get in time for your turn you could give control to your teammates.
This will make sure you don't lose your turn but also make sure your teamate and only him cam play for you.
Also, It should be an option from inside the game so you must do it in a checkbox and you can uncheck it anytime thus taking the control away from him.
He would be able to play for you but only 8 hours prior end of turn time. I thought of 8 hours time cause is the time most people spend in bed so it should be fair.
It would be not a default setting cause it would be used only in a case you are leaving to a place with no internet or vacation. Say you boss is taking everyone in a vacation and you didn't knew. Then you leave someone of your team in control. If you don't come back in time(and the 8 hours are in counting) then he can play for you.
8 hours will also be fair to avoid farming I guess.