The real topic here is this:
Q told us that their bosses were fired and that Priestap, Strzok, Paige are now cooperating witnesses.
"Think about the above."
"Only the above"
"Get the picture?"
Yes: You have to remove the upper bosses, because they were running the conspiracy and they were using the now cooperating witnesses.
Only if you fire the upper bosses, people will be no longer TOO AFRAID, to cooperate as witnesses.
Priestap, Strzok and Paige took as at a signal that things have really changed, when they saw that their corrupt bosses were indeed fired.
Priestap, PS and LP are guilty too, but now they can better their situation, by daring to testify against their ex-bosses.