How do you mean? I'm curious of what you are thinking...do you mean lights like those on top of the pavilions or just effect lights?
Upgrades to the show I would like to see: The addition of LED lighting to the pavilions, meaning they could now change colors.

The usage of light patterns more sophisticated than those used with the outline lighting on the pavilions during the Celebration portion of the show (if you haven't noticed before because of the fireworks, the venues actually dim in and out during that part). I'd like to see a rehab of the globe, which I'm sure will happen now that Illuminations has a sponsor. I would personally love to see some new pyro ideas to jazz up the show. There are a lot of neat things they could do with current technology...hell, they create their own technology, so I would love to see the incorporation of new ideas...they ARE always thinking.