I would have posted this in future suggestions, but I'm not sure whether that forum is being ignored.

Although I like being able to call all the plays in Sandbox, there are some teams/scenarios where I would prefer the AI call the plays for a period of time. This moves along the game, and can give more challenge: say i just want to call the offensive plays for one of the teams, or perhaps both - matching my wits against the AI defensive play calls would make for a much more stimulating game.
This seems like it would be an easy add-on so please consider adding it to the next patch. It would improve the game, at least for me, vastly.

I browse through the future suggestions normally when I'm looking at upcoming features. We can't commit to any specific feature, but we do look at them all.