I think the biggest revelation is there was enough probable cause for FISA to approve surveillance of an American citizen for espionage. Probable cause usually means there’s enough solid evidence to arrest and indict- it’s not just speculation or a fishing expedition. It’s actually a fairly high bar to meet. I don’t think the FBI goes to FISA without a pretty strong case which is one reason for the high approval rate.
Means there’s more than just smoke here and probably the strongest indication so far of real shenanigans between Russia and Trump campaign.