Interesting. I did notice that Fastpasses are usually available day of for the night time show, which wasn't the case in April & May. So if the novelty wears off, I wonder how soon after summer season they'll cut the night hours.
I think we'll know very soon if attendance doesn't pick up from APs and CMs who now aren't blocked out.
CMs were only blocked from AK so we shall see... but AP should be spread around a little, with a slight proportional tendency to show up at Epcot.