This is now in place with:
https://github.com/discourse/discourse/commit/e162cd16b663d4da18cef7492a47550024275753
Implementation is quite complete which means you can not sneak in GIANT edits with no revisions by sneaking in lots and lots of small edits.
@codinghorror I feel given this change we are protected from a certain ugly vector of spam abuse cause we now have proper auditing.
I think we can drop “Disable edit grace period for TL0 users by default” from the release … with this change it is no longer really needed.