Earlier quoted context omitted.
Have you considered having a detailed version history for each book (etext)? The process of submitting fixes to typos etc in books involves sending an email ( https://www.gutenberg.org/help/errata.html ) and although the last time I did this (2011) the fixes did get applied reasonably quickly (couple of days), it all felt a bit opaque. The version history could also include the project (usually PGDP correct?) the ete…
> I have very mixed feelings about Standard Ebooks[…] Why?
When I read an old novel, written two centuries ago in England, the little differences to modern English are part of the charm, and I certainly don't want any Americanism mixed in. For one of my favorite novels, The Forsyte saga, the author deliberately used some rare forms of words, which SE replaced with the mainstream forms.