It's odd. My Timeshare company lists projects for every resort on the resort page, so it's easy to check a year or so ahead. Granted, they often don't give specific dates (it's "mid-March through early June" or whatever), but they give you an idea of what's going on where and approximately when. I don't expect hotels or Timeshares to warn me about hurricane season or anything like that, but when there's planned construction, I expect that information to be available by the time reservations are allowed, often as a note on your registration verification. But with Disney, it seems that getting a notice a few weeks before you get there is the standard.
Disney resorts definitely have a vibe, or an energy, that most places do not. My eldest noticed it when we were wandering some of the Crescent Lake resorts one of our first trips -- we were walking through the Swan and she suddenly said, "This isn't a Disney resort, is it?" For her, the Disney resorts felt fun, while the Swan felt formal. For me the vibe varies from resort to resort, and "fun" isn't always my first thought, but I think there's truth to my daughter's claim that Disney resorts as a whole have a "fun" feeling other resorts lack. If you're sensitive to that energy, and like it, then Disney will probably "live up to the hype."
I always warn newbies that Disney Deluxe is not Real World Deluxe, and that with Disney hotels you're mostly paying for location, transportation, and ambiance, not rooms or service. The standard hotel rooms are small and the service sometimes more cheerful than helpful, but the pools are cool, the public rooms brilliantly themed, and no one matches Disney's transportation system. It could be argued that Disney hotels appeal to a fairly narrow market, but so long as there are enough repeat customers to keep filling the rooms, I doubt Disney sees a problem with that. For people who want to live "in the Disney bubble," Disney's the only game in town.