My advice: Look into the Version 0.1

Set in Stone.

No - there is no Change needed that enables anything new here in protocol level

https://mobile.twitter.com/bitcoinnobody/status/1195451727828271104?p=v


It is all about law enforcments focussed on point - where miners need to alter a single UTXO - correct that and Job done

Guess too easy but anarchos don't like it

When ?

Any time needed and 'global' enforcments come true ( like for Liberty Reserve ..)

Oh - and sooner as too many play dumb IMHO