Standby lines have been shorter, substantially so in some cases. Since more rides offer fastpass than before, more people are displaced. It evens things out. Instead of being in line for Space Mountain, people are instead using their fastpass for the Magic Carpets. That also means that there are more fastpasses then available for Space Mountain (fastpasses for Space and other super popular rides don’t run out now as quickly as they used to). A lot of people see the three a day rule and go “What? Really? Ugh, that’s terrible.” What they don’t understand is that it’s a free, advertised service available to literally every guest in the park, and all you have to do is pull out your phone or visit a kiosk to get it. Fastpasses are so easy to get now (and all in one place at the same time), they can’t just have it be a free-for-all, because fastpasses would be completely gone by noon. Same thing with getting more after you use your three. It’s the same thing, although to a lesser extent.
One of the reasons the system exists is because guests weren’t utilizing the old FP system, meaning they were going on fewer rides and leaving the park unhappy. People like CMs and Annual Passholders who knew the system would get like 7 a day, and regular guests would get 1, MAYBE 2, and often none at all. With the new system, it’s much easier to get a fastpass, so many more people are getting to go on the rides they want to go on. It’s all about leveling the playing field. While the CMs and APs are going “Ugh, what do you mean I ONLY get three?”, regular guests are saying “You mean I get to have THREE of these things?? Thanks so much!!”
There are actually more fastpass users than ever, simply because more rides have fastpass, but the amount of fastpass users per day at a one ride, like Space, that had FP previously, is probably the same. It’s just keeping people in-the-know from getting all the FPs while once-in-a-lifetime guests get none. And while it was great to be able to get lots of FPs for myself, I understand that I should be sharing with people who are only going to be here once in their life.