Fusion is resolution independent. But not framerate independent.
Whatever macros or animations you make will only be created using the original frame rate that you decide. If this is dropped into a timeline using a different frame rate, the macro will speed up or slow down. Yes, yours users will have the ability to change the frame rate to match their projects, but you cant be sure if they will or not.
I would recommend offer at least 24 and 30 fps options.
Sadi