Yes, here's most of what you need to know about the Amtrak Standard Stations Program:Strictly speaking, the Miami station is a "Amtrak Standard Station Type 300A".
peter
https://en.wikipedia.org/wiki/Amtrak_Standard_Stations_Program
While these were architecturally very undistinguished and built to the taste of the 1970s, they were designed to be real stations, not Amshacks. Apparently, they couldn't even afford to build many of them, and thus the true Amshack was born, or they managed to finagle states and localities to pony up the cash to restore old stations or build new ones (I.e. Albany.)