Yep, it's hard to decide what to do in these cases.
Something I'm working on right now has the user execute a macro with KM 10 subroutine parameters. Here's an example, and I'll comment more below:
The names aren't ideal, but I was trying to include a little "help" at the same time. And ignore the macro name with the prefix number.
When I make changes, they still keep their options. But it's only one way to do it.
You can take a look at my Spotlight Search Prompt, where I have the user pass options like this:
If I were to write that now, I'd store all their options in one JSON variable, and provide some way to make it easy for them to set them up, probably with an Execute Subroutine like before.
That's a start. If I remember any other ways I've done it, I'll let you know.