Some shade may be nice, but I don't think it needs much more than that. I don't think they should over theme the area. That way, there is more of a "wow" factor when you enter the parks.
As far as people watching the fireworks from the esplanade, I have no problem with that. It is the same as if they watched them from the sidewalk on Harbor. At least in the Esplanade Disney gets parking fees from them.