I’ve said it many times, but I do NOT like how TP calculates Crowd Levels. It is too dynamic. Which is why I just don’t use their CL numbers. But their ride wait time numbers are useful.
As far as overall crowds…I think it is hard to judge based on estimated attendance figures alone. Ride/attraction capacity does play a role in this as well. As number of bodies increases in the park, it might not be totally noticed by increased wait times if Disney is also increasing overall ride/attraction capacity at the same time.
Having said that, I am a little nervous about our May 2020 trip. It will have been 4 years since our last trip, plus we’re going at a time that is slightly more busy than when we usually have gone. (Still low, by most measurements, though.) While I’m excited about going back, I think I also have the highest level of anxiety I’ve ever felt about planning a Disney trip this time around.