I’ve seen government bureaucrats in action and up-close.
There’s NO WAY a middle-level shitstain career apparatchik takes it upon himself to fake a document to a Federal FISA court in a “national security” investigation being run by the highest levels of the FBI. Such people don’t move unless there is clear instructions and organizational buy-in from everyone around him.
Clinesmith was on the team that conducted the Clinton e-mail investigation, then the Carter Page FISA warrant, then placed on Mueller's Special Council team. He was hand picked for all of these jobs. He was no "middle-level shitstain career apparatchik", he was a core member of Comey's "dirty jobs" team. He was a guy Comey could count on to do whatever it took to help Hillary and destroy Trump.
Now the question is will Clinesmith flip? Was he smart enough to preserve evidence, or is he a true believer who is willing to take the fall for Comey? Yes, he almost certainly falsified the e-mail on orders from Comey and/or McCabe. Does he have evidence of that? Will he testify to that? What else did he do as a part of the Hillary, Page and Russia Russia Russia investigations? No way was this just a one time thing. People on those teams have to be worried.