Well, there's no FP+ now and almost nothing has a low wait, so not sure I buy that.
People could use their 3 FP's however they wanted...if they wanted to do shows or C tickets that didn't usually have big waits, that was up to them. Personally we always picked 3 E-tickets, rope dropped a 4th and did some smaller stuff and shows in between. Usually hit a dozen things by noon including most/all of the e-tickets (except in the MK- too many there for 1 morning).
Everyone has a different opinion about FP+ and I think individual views come down to generally 2 things: How effectively you used it and what your touring style was. If you liked to plan, then it generally worked great because you could basically guarantee that you had 3 (big if you wanted) rides booked and wouldn't have to wait 1-2 hours for each one. If you didn't like planning ahead and enjoyed just walking around the park and riding whatever you felt like, then it probably did increase your wait times somewhat....though I think Disney increasing the number of people in the parks over that same time period without building much new capacity probably had more to do with the increased waits than FP+ did.
If you didn't like FP+ and think things will be alot better now without it, then I encourage you to go to WDW and see what it's like and comeback and give us an honest assessment of how it was without FP+. I've been there twice this year and the January Trip was far different from the July trip as far as lines and crowds. So much so that I have very little desire to go back until things change.