"Good news, everyone!"
Just on a whim, I decided to try Peacock with 6227 again, and the new releases work, and SF downloads E-AC-3 instead of AAC! So was probably a server thing that SF needed adjusting for new releases on their end, which they seem to have done
I had a feeling the Peacock issue, with new releases, was server side but did not want to say.
Good to know that going back to 6227 gives E-AC-3 instead of AAC.
Sucks that 6230 broke that.
Older content, I only tried one movie, did seem to still come in EAC3 on 6230, so it just makes you go hmmmmmmmm.