I agree the shoulder turns in example 1 are too extreme.
All of this movement is unnecessary and may lead to missing a call. Having the C stay parallel with the sideline allows them to maintain a wider viewing angle, which gives them the ability to pick up players more quickly as they move into their PCA. By fully turning the body, the officials in the video are closing off and limiting their viewing angle.
If I have a question about whether or not C has picked up a dribbler, I'll see him in my peripheral vision. I don't look for his eyes, but I can see the direction his head is turned.
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