No worries @bix, you are explaining it right.
This jerry-rigging can be done. It would take grabbing the body of a post, parsing through the body with the parameters laid out above, and then slugifying what’s left over - all of which is possible through some calls to the API.
Though you do remind me of the request for changing slugs before you publish. That would definitely help in the future. And perhaps @matt could fill us in further on the word/character limit for slugs. Once those parameters are known, a script of sorts could be made.
Hope that all makes sense!