The default value will only be used if it appears in the Inspector tab in the Schematic view. In other words, if you don't delete the '1', then the value that is used will be 1.
Since this is a standalone subsystem, you can do one of two things to achieve your goal: either enter the values as defaults and delete the '1' values (as described above), or enter your custom values/equations directly into the Inspector tab so that the default values are ignored.
If you're planning to use more than one copy of the subsystem, then you should convert the subsystem to a shared subsystem. For shared subsystems, the easiest way to do what you want is to define all of your default values directly in the Default Value fields in the Parameters area. If you then make a copy of the subsystem and delete the original, the copied subsystem (and any other copies you make) will automatically have all of the parameters in the Inspector tab populated with your default values.
Happy to help!