Under Franks, evidence seized pursuant to a search warrant must be suppressed when the defendant shows by a preponderance of the evidence that (1) the affidavit in support of the warrant contains false statements or misleading omissions, (2) the false statements or omissions were made deliberately or with reckless disregard for the truth, and (3) probable cause would not have existed without the false statements and/or omissions.
Even assuming arguendo that #1 and #2 are met (tough threshold), #3 is often the toughest hurdle for a defendant seeking to suppress evidence obtained from a warrant.
So, without seeing the entire four corners of the FISA warrants related to Carter Page, it is hard to say whether they would pass muster.
My understanding is that the FBI and Schiff see it much differently than the insinuations made in the Nunes memo.