It really helped spread out the crowds. Music Plaza can’t handle the amount of people that want to see a NYE display. The concert yard capacity is 15k max. There was far more than that in the park today (although it wasn’t as crowded as some may think... Friday was the worst). So splitting it up allows it to provide options while easing strain.
Although I am beginning to think it’s going to get to the point where IOA is going to need to stay open for midnight, too.