You're actually mistaken. I'm just going to leave it at that. FP+ is a disaster. You think you're being rewarded, but in reality, you're being punished.
I do think the majority of people are waiting longer in lines due to fastpass... but I assure you I am not on my trips. I was in Disney actually exactly a year ago (so July 4th week) and managed to get the following fastpasses in 1 day each in the park.
MK (16): Splash, Thunder, Haunted Mansion, Pan, Pooh (x2), 7 dwarfs, Meet Tiana and Rapunzel, Meet Ariel, Under the Sea, Dumbo, Tea Cups, Buzz (x2), Meet Mickey & Minnie (they were meeting together) and Meet Tinkerbell.
--We also had time to watch the parade, meet Donald and Goofy, go on jungle cruise, Aladdin, pirates, Philharmagic, Small world, COP, and watch the fireworks
EPCOT (7): Soarin, Test Track, Frozen (x2), Nemo, The Land, Spaceship Earth. Also got a late night FP for Illuminations
--This was all in about 3.5 hours as we spent the entire afternoon and evening in World Showcase
DHS (9): Slinky, TSMM (x2), RnRC, ToT, ST (x3), and F!
-We also watched Frozen, Indy, BatB, Muppets, Star Wars show, Walked through Launch Bay, Met Olaf, road Alien, and had a sit down dinner at Prime time. This was before GE and MMRR opened.
AK(8): Navi River (x2), Fop (x2), Kilimanjaro, Everest (x3)
--We also watched Nemo and FotLK, did gorilla falls and the jungle trek. We also left that day around 3 because we were driving to a beach that night.
I rode everything I wanted, saw every show I wanted, sat and relaxed for all of my meals (even sat for breakfast in the parks each day), met every character I wanted to, and never waited more than 20 minutes (small world was my longest line of the whole trip). I can guarantee with the elimination of FP+ I would NOT be able to say the same thing. Sure standby waits would drop some if FP+ was eliminated... but I almost never stand in a standby line outside of shows (which FP does NOT save you time for) and Rope Dropping (where standby lines are short anyway).