Yeah, that's why you limit the challenges to one each half. That way, you have more continuity of play, and the managers must be more prudent in their challenges. Booking the captain for dissent is clunky, kind of pointless and unneccesary. You put it in the hands of the managers (as it should be, I'd think), and if the video proves the ref got the call right, then the play stands, simple as that, and possession is rewarded to the team on the right side of the call.