He didn't see anything he didn't already know. What he saw that terrified him is what was about to be released to the public and if he didn't appear shocked and take immediate action it could appear that maybe he is part of the problem and the cover up. Which in my opinion he is part of the coverup and is likely just as dirty as comey mccabe and all the rest.
Let's face it people, it's pretty clear that anyone near the level of these guys in the FBI or the DOJ is a corrupt deep state leftist. I think you would have to go down many levels before you would find anyone that isn't part of the deep state.
As far as I can tell, the New York Times is the source for the claim that it was the IG report that forced Wray to move on McCabe.
Judicial Watch also uncovered documents that indicate McCabe used FBI resources to support his wife’s political campaign. That would seem far less serious than other charges that could be made against McCabe, so those will probably be the ones used.
Another possibility is that Wray has proven an independence from the White House. He threatened to resign if McCabe was fired. Suddenly after reading the memo he is so concerned by its contents that he immediately does an about face and fires the guy he was going to resign over. This gives more street cred as to the importance of the memo. The MSM had gushed over the fact that Wray had threatened to resign. They turned Wray into a hero. The “hero” fires McCabe. The timing is perfect.
Wray having established his bona fides with the press can now credibally go after deep staters. The libs in the press will have to reverse themselves and lose what little credibility they have with the public as they are forced to write to the shrinking left fringe of democratic party.