> Yueh isn’t a mentat and his betrayal is unrelated to mentats.

Thank you, CO! :-D

But I didn't mean that he's mentat, just that Atreides and Harkonnen mentats main activity was related to the traitor plot, which was rather faithfully done in Lynch's version, and was all but omitted in Villeneuve's. The tiny detail that the Baron personally killed Yueh, thus removing the last bit of importance from DeVries before his death, is the final offence to his character.