Even though it seldom matters whether Mirai lands her jumps 89 or 91 degrees short, because technical callers tend not to follow the 1/4 turn distinction and go by what they arbitrarily think is underrotated...
NOT true. Replay is available (realtime and slomo) and has the benefit of multiple camera angles. And there are 3 on the technical team: 2 technical specialists and a technical controller, who is a judge. If both specialists don't agree on a call, the controller settles the dispute and will refer to the replay to do so.