The FP tier complaints don't exactly make sense to me. Is there actually an expectation among folks that they should be able to get a fast pass for the three most popular rides? What would be the point of FP in Epcot if it wasn't tiered? As it has been said, folks would just choose the exact same three rides. So now, instead of helping you do a few things faster, it simply pushes the crowds into every single other line and makes it virtually impossible to go on one of the big three without a fastpass. Tiering it forces some of those fast passes to go to mid tier attractions, breaking up the deadlock a bit.
I haven't gotten a Soarin' fast pass in the last 3 times I've been to Epcot, because I can simply walk on when the park opens. My point being, there are other ways to go about experiencing the park outside of fastpasses.... that is just one extra way of getting a few more things done.