It did happen. In fact, the experience that we had was that.... It was an initiative that was proposed initially by a Speaker. When his term ended, the project was continued and eventually the rules committee decided that yes, this was probably something worthwhile. They became actively involved in doing it. What mattered and what encouraged them to actually undertake this was that a working draft had been prepared for them.
This is not fun work. It is actually challenging to try to do this. It's not something that even in 1984-85, when the McGrath committee was sitting.... It's not a fun thing for the members themselves to work on revising the Standing Orders. It's more manageable when you have something to work with and you can review and decide that you don't like something so you change the language, or it's not good enough, or you don't think it belongs here or it should belong elsewhere.
If there's any value in trying to update the Standing Orders, you really have to be working with a model that you can accept, reject, change, or whatever you'd like to do.