Way too complicated IMO. Just not worth even close to that level of mechanism for something (lock up) that is very minor to the platform overall.

If someone were building a system like Steem today it would not have 13 week lockup and certainly would not have the 2 year lockup that was originally there (and for which reducing to 13 weeks was proposed as a compromise). It would probably have a few days to possibly a few weeks of lockup, or maybe none.

These were experimental ideas, worth a try, but really did not demonstrate any clear benefits, did not catch on more broadly, and should be left behind.