How can hardcore fans see? I may be hardcore fan, but I'm not an expert... Plus I don't think Scott was really analysing things as careful as a tech caller would be.
Scott knew that Miria had underrotation issues and flutzing issues. This scenario has been happening with Mirai all season long.
Yeah, well, I guess Scott thought that Mirai's gorgeous spins, superior spirals and electrifying performance was more than enough to beat Rachael, and so did a lot of other people. Besides, Scott did question Mirai's last triple while he was commentating.