I personally think the Lion's Head detpur was actually difficult enough even without the choreography. Because of the extremely limited field of vision, it made sense that the Racers were being led in the procession, and having been given a chance to practice the turns and steps before beginning the procession, it still required a lot of the Racers to carry the masks for whatever distance was involved. The only advantage to the Head's task was that they arrived at the one location and were led to the end of the procession route, which meant they couldn't get lost. That balances out the egg task which did require teams to carry the egg and fire on their heads after getting the eggs from another location, and had better odds of losing time because of the additional stop. So I think the tasks were designed to be roughly equal in difficulty, although some teams would have had trouble with either one task or the other.