From a photgraphic point of view the firworks dont seem to 'pop' as much as much as they should/could/would
Not to sure if there's a whole lot that could be done when shooting over a whole bunch of other lights and on a bright cloudy sky. The orange tint everything seems to get from the city lights is a bit off putting for me too.
Anyhoo.. this all sounds a bit negative, im really just trying to provide some constructive criticism, just a bit light on the constructive part.
You have captured them well just the colors that dont quite work for me.
A couple of seconds with levels, color balance etc. in photoshop can get rid of the orange hue. No real science to what ive done (mainly because i dont really know it yet), just played with the sliders