If anything, I can see it putting you at a disadvantage in finding a good spot to watch HEA when you leave the Plaza restaurant. The CMs keep foot traffic moving along the open paths so you would not be able to just walk out of the building at 9 and stand there to watch the show.
It's been about 2 years since I last ate at the PLaza, but I don't remember any good views through the windows that would make me think it would be a good inside viewing location either.