We're certainly seeing unprecedented crowd levels these days. A moderately busy day in the late 00's to early 10's is now a "light" day. There are basically no slow days anymore where everything is walk-on. This is further hindered by the fact that Disney has tirelessly ensured that slow seasons don't really exist anymore, as crowd levels are spread more evenly throughout the year. Your best bet for low crowds these days would be September after Labor Day and Late January through mid February, and even then, it's a few days here and there at best.I only thing that I don't like about WDW now(besides the price of course) is that they let too many people in. If they cut it in 1/2, everyone would be loving their experience.
At this point I think another recession is the only thing that will stop it, as clearly raising prices and charging for more things has not been enough.