Exactly, the hourly ride capacities have not altered, but now a significant proportion of guests are being 'fast tracked' in front of the main queue lines on a lot more rides than before. There is no other possible result than to increase the regular queuing time for everyone else, it's simple mathematics (in fact that was happening before, with regular FP attractions, anyway).
And as guests are relatively limited as to how many FastPasses can be booked per day (unless you really work the system) that tends to mean that your access to the majority of attractions will be via the standby lines, which are now longer than they were before. So overall, yes you can still get (a few) FastPasses - but riding anything else (without using a FastPass) will probably take a bit longer.
And if for any reason you can't - or just haven't - pre-booked any FastPass+ slots, pretty much every attraction that might want to ride will take a little bit longer than it would have done otherwise.
Andre