If you are there on an extremely slow day, you will be OK. But even if the old fastpass system is still in effect, and it appears it will be...be aware that there are not very many actual paper fastpass times left at the headliner rides...and ALL of the rides and shows now have fastpass (even the ones that never had fastpass before.) BUT many rides have fastpass+ but no fastpass paper ticket machines, so you're just out of luck there...like Pirates of the Caribbean had 30 minute standby on a slow day because they're now running a fastpass line there too. But there is no fastpasspaper ticket machine for it so if you don't have fastpass+ you have no chance to get Pirates fastpass and there are now built in waits because of the fastpass+ line. The crowds that day I would have guessed walk-on for Pirates, but not now because the fastpass+ is redistributing the crowds much more effectively (for Disney anyway.)
And we were at Epcot in mid-October on a medium-slow day (it was rated a "4" on the crowd calendar) but guesstimating the actual crowd early in the day, it was more like a 3. Maybe getting to be a 4 by the time we left around 1:00 PM that day. We arrived at Epcot 45 minutes before the park opened, we were 4th in line at the ticket turnstyle. They opened the park about 10 minutes before 9:00. I was on a
scooter, and went directly to the Soarin' Fastpass machines...arriving there at 8:55 AM. There were only 3 people in the room ahead of me. Pulled 5 fastpasses with our park tickets--the return times were 12, 2:00, 2:10, 2:10 and 2:15. While waiting for my family to get to Soarin for a stand-by ride, the fastpass return time jumped to 5:30 PM at 9:00 AM. When my family joined me to get in the stand-by line, at 9:05 AM...the fastpass return time was 8:00 PM. When we left the land building about 9:30 AM and went by the electronic times sign both Soarin' and Test Track said fastpasses were gone for the day. This was in the early morning, before the crowds arrived!
As for the tiered fastpass+ system...that makes for interesting touring issues. That same day at Epcot...at 9:30 in the morning on a slow morning, Journey into Imagination had a stand-by wait time of 40 minutes! Because there was a whole bunch of people who actually booked fastpasses for Figment. Later in the morning Figment was back to normal walk-on...but that first hour it was very busy. Crazy.