Rosenstein’s testimony before Congress seems prima facie at odds with Rule 11 because it suggests that he undertook little or no inquiry into the facts and regarded his signature on FISA applications as a mere bureaucratic formality.
There might be legitimate practical limitations on the depth his inquiry can go, just based on the numbef of hours in a year and the number of FISA applications in a year, combined with other responsibilities on his desk, including appearing before Congress.
As far as I know, he undertook no inquiry at all, and also as far as I know, this has been the common practice for years. Other people personally compile the application, as well as negotiate with the FISA judge who happens to be on duty.
The entire FISA system is a waste of money. It doesn't curtail snooping, and the warrants are rarely used in criminal prosecutions. How much money do we pay people to compile BS applications? The primary function of them is to immunize the snooper.