I wasn't expecting large fireworks, but at least better low altitude effects similar to EVE, the holiday nighttime show or Waterworld (given that it's 4th of July). As
@Ron101 mentioned, I've concluded the show I saw may have experienced technical difficulties. I can understand that USH may have limitations due to their proximity to nearby neighborhoods, but on the 4th of July when fireworks show were rampant, I'm don't understand why USH couldn't have had a full-blown fireworks show. Perhaps there's some sort of ordinance I'm not aware of.