You could accomplish the same using just this, though I'm not sure if it's what you want:
But to 'be dynamic' as in your post, after editing step.rc, you can use !reload to reload step.rc. If then you need modules to use the updated settings, you can use !reloadmodule <path-to-module>.

!refresh has always been a source of erratic behavior and inconsistency for me, since not all modules handle it [the same].