I'm no expert on the fine points of interviewing but I've always felt Beato does a very good job. After all, he's asking questions about topics I'm interested in, so he doesn't need to try to charm me as well.
This interview with Dias is the only one of Beato's interviews I've seen in which Beato seemed unable to elicit much enthusiasm from his guest. I tend to think @hilde45 is correct suggesting a possible mental health issue with Dias. His affect is unnaturally flat.