We tried on 2 EPCOT days to book FP+ early to pick up a 4th for either TT or Illuminations and no luck in October. But, we also found that there was some use for our other 2 FP+ and even the 4th because where we used to walk on figment, Nemo, and Spaceship Earth pre-FP+, we know find them having 25 to 30 minute lines frequently. Nemo was up to 30 minutes before 10 am.