Absolutely. It's not really cover, I don't think. It's following procedure, asinine as that might be. These decisions re supposed to be made with a clear, unbiased, and objective mind.
Although it is true that McCabe did not trust Sessions either, if we believe that part of news reports. McCabe, like Comey, is a real piece of work. They were insubordinate, in spades. I think they would admit that, and justify their efforts to see the Trump administration deposed. They see themselves as white-hat saviors.
They will also "use the book" to defend themselves, so any deviation from protocol in giving them what's coming is going to be used by them, to their advantage. Can't give them the least opening.