I'm worried about crowds as well. They say the week before Thanksgiving is typically not too bad, but looking at limited ADRs and room availability seems to indicate otherwise.
I know ADRs aren't always the best indicator with free dining and people booking multiple ADRs this far out, but like you said, other FD weeks aren't this bad. And, room availability is also extremely limited the week before Thanksgiving.
I thought a lot of people wouldn't take their kids out of school the week before Thanksgiving break. But they've been saying for years that the week before Thanksgiving is lower crowds so maybe people are all planning to go at that time and now it's no longer lower crowds??
Not that anytime is 'slow' at Disney these days!!