Not really. We did Soarin' in 2011, it was just DS and me. We used a FP around 11am. He LOVED it. I believe there were either 1) NO FP left for the day or 2) the return time was 11pm or something crazy. Luckily, we had an "anytime" FP for another reason. Otherwise, we would not have gotten to ride it twice (with little wait) under legacy either.
I went into FP+ really scared. The thing I was scared about was the long waits on the less thrilling rides. TSMM, A&E, Peter Pan, Great Movie Ride, Jungle Cruise, and Winnie the Pooh are really the only rides that we saw that had lines that wouldn't have been worth waiting in on the "whole family" kind of rides/attractions. PotC was closed, but I never saw the fabled 60 minute waits for Haunted Mansion now that they added FP+
It was crowded, it was June, we never even tried for a 4th FP, we never waited in line.