I like this mod as much as the next guy, but I also have a few problems, as I'm sure some others do.
First, I'd like to know why "Las Vegas" and "Hollywood" are wonders.

This isn't a game encompassing American history, and it's feats. It's a game spanning all of human history, and that includes foreign civilizations. And, I have to say, it feels a bit kooky building Hollywood in Russia, or Las Vegas in Zululand.
Some of the improvements are totally useless, I have to say. Electricity is one. IMO, Electricity should come with a tech, not through an improvement. And why is the Shrine an improvement? It's better suited as a small wonder, and should give 1 happy citizen in every city. Amusement parks, casinos, and parks are OK, but should be relatively easy to build. Theaters, Television Stations, and Newspaper Companies are good ideas, as well.
However, I'd like to propose some new improvements. One is the National Bank improvement. It acts as a small wonder, and gives 5% to the treasury. Another is a collective farm improvement, which makes 1 citizen in that city unhappy, but increases food in water, and could double city growth, if desired. Three and four could be National Television Stations, and National Newspaper Companies, which act as small wonders. They could act as resistance to propaganda, lower war weariness, and quite possibly, increase the chance of Great Leader appearance. They also make 1 citizen in all cities content, and should somehow make regular television/newspaper stations obsolete(This is, as if, the government has taken over, and nationalized all property, thus become all government property. Due to this, all regular television/newspaper stations/companies gain a bonus in happiness. Thus, they should now give 2 citizens happy in city it is built-in. However, once national newspaper/television comes in, they become obsolete, and their 2-people happy bonus is lost.) Also, I propose National Army and Naval Bases, or Central Command, which would act as a small wonder, and would allow for Armies built without Leaders, the reduction of corruption in all cities, and building larger armies, overall. However, it would make one citizen unhappy in all cities(to simulate martial law).
And that's all.
I will add more, if anyone desires to read more.
If you have comments on this post, just reply to it.
Propaganda.