To launch the Vegas race, which F1 has promoted itself at a cost of £355 million so far, an opening ceremony was held on the main straight on Thursday. Kylie Minogue and 30 Seconds To Mars were among the music acts.
Then, each teams' drivers were raised on platforms to be presented to the grandstand.
This special production followed Sainz, Lando Norris, Alex Albon and Pierre Gasly all taking part in a golfing competition on Wednesday as part of the newly created Netflix Cup.
Given the additions to the usual weekend schedule at the end of a 23-round calendar, Sainz believed the timetable could do with a rethink.
The Spaniard, who reckoned "weird" timings had prevented him from completing a track walk, said: "Looking into the future, sure we're going to need to reconsider a bit the way we go racing at the weekends because our schedules are getting busier and busier every year.
"The weekends are almost starting earlier, rather than starting later. We are adding races to the calendar and it's getting to a point where I think, sometimes, everything feels a bit repetitive, and everything feels a bit overpacked and we're trying maybe to overdo it a bit.
"There are things that I actually think they do a lot for the sport and it's good to put on a show and to make the sport better. Then, on the other hand, there are other things that feel very repetitive and almost don't add any more for the weekend."
Source: Autosport