I think it's been a LONG time since they made the racers decipher the clues on a regular basis. There may have been an isolated clue here and there that required them to figure something out, but overall, it's been at least ten seasons since the clues have been very difficult. I think any of us that are fans of the "race" aspect of the show would like to see more difficult clues. But the reality is, watching the racers blunder around without being able to figure out the clue does not make for good TV. And this is a TV show first, and a race second. They have to keep the teams moving and keep the action flowing. Having a bunch of dough heads running around asking locals what some clue means isn't compelling TV.