Like in the basketball example I used, the consequence or effect of freelancing, is that the AI teammates attempt to compensate which inherently causes potential disarray. That would then promote Users to either pick a play where they can User control an assigned "freelancer", adhere to the parameters of their own playcall or suffer the consequences/effects.
The premise already exists in M13 because if you pick a Cover 2 Man under against a 2WR 2TE 1RB set, I think, with the RB and TE running crossing routes, the defender assigned to check each in the playart, will switch off. So if you are using controlling one of these defenders and try to cover strictly based on the playart, one of them winds up wide open. Same principle except these "switches" are dictated by excessive movement outside the parameters of the playcall opposed to by the playcall itself.