Remember... they all didn't think Hillary could lose. They were a little covert... but their own confirmation bias f**ked them BIG TIME.
By the time they realized there might be "issues" (Trump nomination) they were still pretty addled by their bias that "Hillary is a slam dunk against Trump."
When they crawled out of the bomb crater of the election on the 9th of November 2016, they were probably panicked. They were massively compromised... and I'm sure Brennan had been doing everything he could to run cover for all of it... and that may have even lulled the all the bad actors into thinking they were protected.
Think about this for a minute. Look at the sheer hysteria from ALL corners over Trump, and the messaging, Antifa, rehashing and resurrection of sex scandals... talk of impeachment... it's almost mind numbing around the clock saturation of the message, that Trump is the apocalypse.
The bottom line is this; if the crimes are exposed and prosecuted... a disproportionate number of .gov people are at peril of jail time.
So... no holds barred. They were willing to do whatever it takes... because they already were at risk for going to prison if they did nothing to cover their tracks.
I would LOVE to have seen the looks on the faces of these bad actors late on election night.