It's the top of the iceberg. Read Collyer's April 2017 Opinion and Order. The government undetakes RAMPANT warrantless snooping -- which is coincidentally constitiutional when performed to gather foreign intelligence.
The FISA warrant stack is there to "prove" a falsehood - that the government uses utmost care and the highest standards before snooping.
I see a real practical barrier to getting a "lied to the FISA court" conviction. I bet the application is literally true. Misleading, but literally true.