I have eaten here a few times over the years when conducting business at the hotel/casino. I have never been disappointed with the soups. I usually order the Wonton Shrimp or the Duck.
There are many awesome Asian restaurants in Las Vegas, away from the strip with great food and decent prices.
I don't see this place as a restaurant locals would go out of their way to go to. They are serving hotel guests, gamblers or show attendees. They probably don't really care about their Yelp reviews as much as a local, non-casino restaurant would.
With that said, I would go back if I was already on the property and wanted soup but I would never go to this place as a destination restaurant.