Trying to tell that the rotate was only one maneuver over, merely by looking at the angular rotation, would not neccesarily be trivial.
Maybe requires a FAQ but I'd insist on seeing the dial before it's changed if it were me. There's no reason for them not to show it at that point.
Until there is something that the non-activating player can do that takes place between BoShek causing the dial to change and the maneuver being performed there is nothing to be gained from that being hidden information. Not having the originally selected maneuver become open information is just asking for accusations of cheating.