I agree. I put the FFS sticky together because there was nothing except a mention in a monero missives podcast at some point. And ultimately this has been an organic, lets-figure-out-how-it-should-work-as-we-go thing. But perhaps we're at the point where we figured it out?
If you want a document to exist, the fastest way it will happen is if you draft something (be the change you want to see in the world! :) ). We can shoot it back and forth if you want, or discuss its specifics in this thread. Some of the more clear FFS proposals have been drafted by debruyne, tewingent, and moneromooo ... (hell, everyone except me). So maybe I'm not the best to be discussing this. But getting these folks involved would be good. But its rare that people frequent this forum unless they are specifically pointed to it.
Regarding the infrastructure surrounding the FFS (revamp paragraph), I don't know what a good alternative would be.