Almost all of my Disney trips have been during value season and I love it. You're going to find some attraction closures no matter what time of the year you go, something is always getting refurbed. I have always been lucky and haven't visited when there are major attractions down for refurb, but I can understand why they would schedule them for the value times of the year. And in my opinion, I don't think one specific time of the year experiences more ride closures than others, I think Disney does a pretty good job of evenly scheduling their refurbs. The low crowds and great weather in Jan-Feb & Sept make them perfect times to visit. I've been during both of those times of the year, September is personally my favorite. Parks were empty and decorated in their fall decor, plus you have Mickey's Not So Scary Halloween Party going on, if you choose to see it.