Thinking of a brilliant* password updating scheme creates a weird solitude. You want your brilliant scheme to be appreciated, but if you tell anyone what it is, its security is undermined.
* By "brilliant" I meant something akin to "easy to remember, but hard to brute force". But now that I think about it, when those ideas are expressed in terms of entropy, they sound like potential opposites. "Hard to brute force" is definitely just "high entropy". Is "easy to remember" the same as "low entropy"?