Everything I have read is expect another big change come July. Supposedly
MDE v-2 is coming which will allow for booking and access on the app. Another thin I heard was they were going to change the type of FP (attraction vs parade/fireworks) so that people could utilize the 3 choices a bit better and not get stuck because your last one doesn't expire until 9 or 10 pm.
I highly doubt tiering will come to MK as there are enough big attractions to sustain all of the crowds
Again this is all rumor, but I expect some of these to prove true