I think she sounds bitter and spiteful more than anything else. Like the guy who played Boba Fett for the Jabba scene in ANH whining about the name of Fett’s ship. OK, maybe not that bad…
Still, I find her critiques paper-thin more than anything else.
To be fair, she probably only watched the movies once, when they first released. And she may not have even watched TRoS. So she’s not really in a position to go into further detail on them, and that’s not what she wanted to focus on here, anyway.
She came very close to dropping the “Mary Sue” dog whistle.
Also, “Mary Sue” is not a dogwhistle. There are plenty of well known male Mary Sues/Gary Stus in fiction. I’m not sure what you’re implying about Marcia Lucas with that. I know people who avoid using the term because they don’t want to be accused of being some sort of reactionary, but it’s a valid term in character criticism.