All of October doesn't make much sense. They should have left party nights open. The crowd reports seem to indicate that other guests avoid MK during party nights, because of the shorter hours. So it would be the perfect days to allow the sign-ins.
I do think vacation patterns are changing and October is not what it used to be 15 years ago. With the Halloween parties, and Food & Wine overlapping, year round schools, when people look to when WDW is the best "bang for the buck," October ranks really high. So I would expect some blockout days now, but not all.
It's our year for Christmas in Orlando (arrive the week before, and then fly out shortly after the holiday), and in the past we've always managed to be able to hit all the parks one day without a blockout date, although MK would have to be the first day. After they did what they did last year, we've already been planning on not going to WDW at all this year because I expect everything to be blocked out again. And that's why we have Universal passes.
