Actually it is, we have a trip coming up in a couple of months and that's what we paid per night. It's not no kids but it is usually less kids because a lot of families with kids are typically looking to save a buck and stay in value. Don't even get me started on school groups and Pop Warner. And, as you pointed out, with the resorts being more spread out (and immersive) you don't notice the ones that are there as much adding illusion to the actual lower numbers.
I'm disabled and walk with a cane and I can handle the moderates just fine, you just have to request rooms specific to your limits. I actually know a lot of people who specifically request the further out rooms because they enjoy the walking.
But for me, the most minimal amount of bargain hunting without even going through a third party has landed me with, at most, $220 a night and I've ONLY ever stayed in moderate. Nothing against the other resort types, moderate is just more my thing and most people who stay moderate regularly know better than to pay $300 a night for even a nicer view moderate room. Next year's prices seem a bit higher, but that seems to be true across the board.