So I just got back from my trip yesterday to Universal in Orlando and the Grinchmas show is absolutely fantastic. Unfortunately I forgot my camera so I don't have any video or pictures, but I loved it. The music was great, the acting spectacular, and the story is very heartwarming. The only real complaint I had was that the sightlines aren't the best as you have several trees which can block your view. But other than that, its great.
I highly recommend that you go see it.
Now as for the Macy's parade in Universal. That just does nothing for me anymore. Its a parade that seems very tired. The tree is beautiful, but most of the balloons are looking fairly ragged and seeing decorated trailers being pulled by trucks just seems like something I'd see in my hometown parade, and not something in a theme park. At least not when compared to how Disney does parades.