I strongly disagree, and I think you mistake what DIF is, and always has been about.
DIF has, past the first 20 episodes or so, been primarily about the story structure, plot mechanics, and directorial choices that make a film work or not work. There have certainly been digressions about how particular things were filmed, but that has never been the core of the commentaries, except for some specific episodes where Trey had worked on the movies.
DIF isn't typically in a position to talk about how something was made, because more often then not they have had no involvement in a film. VFX talk will get mentioned as that is the primary field of the commentators, but is never really a primary focus.
The thing that separates DIF from most film podcasts is not necessarily what they're doing (providing opinions on whether they like or dislike a film), but that they're able to very specifically articulate why that's the case, citing specific evidence from the films, and offering suggestions on what may have worked better.
In this regard I think Looper and Prometheus are some of the best episodes DIF has done. Can't comment on Pans Labyrinth as I haven't seen the film or listened to the DIF for it.