And out of curiosity why would they want to curtail the repetitive style of touring??
You have to look at the capacities.
Test Track can handle 13,000 riders in a day.
Soarin can handle some 17,000 riders in a day.
Around 40,000 visitors hit up Epcot.
Clearly... there are insufficient ridings to go around such that everyone can get even a single Fast Pass. Thus, you are limited to 1.
Before, it was pretty much first-come-first serve... If you were quick, and knew the system, you could get 4 or more fast passes. But for each guest that pulled 4, 3 other guests got none. Disney would rather have 4 guests ride once than one guest ride 4 times and 3 guests not at all. Thus, you have Tiering.
I would love to be able to ride more, and look forward with eager anticipation for what they're doing with Star Wars at Epcot... but the changes they've made seem to have addressed a gaping problem that existed in FP-.
Also note that it's not as bad as it seems on paper. "despite" what everyone complains about, we still managed to ride Soarin once, and TT like 3 times in a day, even during a rather F&G week. This is because the 3 FPs that you do get, you get more efficiently, and it saves you a lot of time. So if you have to wait standby for a ride or two, you're already ahead of the game due to FP+ saving you time up front. So there are pros and cons to it.