I think they know what will be in the OIG report to be released next week.
It will confirm illegal and felonious activities by these players.
They are probably changing into rubber underwear and calling their lawyers.
This could convert The Swamp into a "shithole" before it's over with.
The OIG "review" is limited in scope to the email and leak investigations and I haven't seen credible evidence that says it will be released next week.
The above folks that you mention have gone quiet because that's what one does when one skates away.