with the height restrictions and the alcohol being available in the restaurant / food area, its obvious to me that Disney has done alot of customer profiling and are targeting Star Wars fan community with this new land.
This new land is not being aimed at the current customer who visits
Disneyland. This new land is for the Star Wars fanatics, those who go to Comic Con and Cosplay events, those who go to all the Star Wars conventions, people who have disposable income and will pay the entrance fee to Disneyland just to experience Galaxys Edge. These are the people who would travel from New York for a Star Wars Convention in Anaheim but who would not visit Disneyland.
By having the height restrictions they are segmenting the guests as many families with children under the height range will not go on the rides
By having alcohol available, again they are segmenting the guests, as families with children may not want their kids in an alcohol environment