While Veronica and Thomas struggled in the temple, the path was strange. And while their success was very low, I can sympathize with them for their layout (which, I must point out, is different than sympathizing for them due to their ability). This was the first and only Season 3 episode that featured a dead end. This was also the first episode of the new season, so it was more-or-less a "testing ground" for the new rooms and objectives. Once the producers saw that adding dead ends to the already more difficult series of rooms was excessive, they probably realized that it was sufficiently difficult to have teams proceed in a predetermined path, rather than have to deal with dead ends on top of it. This pattern of trial-by-error and adjusting/clarifying episode-by-episode was seen in several moat crossings and temple games throughout the duration of the show as well. So all in all, I am not surprised that the producers chose to get rid of the dead ends for Season 3.
Another point of interest I want to mention in regards to the Bifocal Monocle run occurred after Veronica encountered the temple guard in the Ancient Warriors. One of the cameramen (or perhaps another crew person, etc.) mumbles something about a "door" when there is 0:55 left on the temple run clock. She then kneels down by the door that led back into the Chamber of the Sacred Markers before looking at the cameraman, hesitating, and proceeding up to the King's Storeroom. Perhaps she intended on returning to the Chamber, but was influenced otherwise to head to the King's Storeroom.