One more thing: October is just a nice time here in Florida. Humidity is down, clear blue skies, cooler days and even cooler evenings.
While it is cooler than July or August, it still isn't what I would call much of an improvement until that last two weeks of October and that's when the crowds seem to really jump for the month. Frankly December has become my preferred time for Disney as the weather is finally cooler and if you go early in the month the crowds aren't that bad.