Went in late Jan '16. Crowds are very manageable for my crowdaphobic wife. That was the year it dipped to freezing middle of a week stay. First day it dumped in the morning and the rest of the days were nice semi clouding mostly sunny days.
Refurbishment is right. Nothing in MK was closed, but all the other parks had down attractions. DAK, had the trails around the tree closed, the Kali ride and the entire walking area of Asia was closed off. A few of the rides were down for parts of the day.
EPCOT there was no Sorin, they were refurbishing for Frozen. DHS, was mostly open, they did start to wall off around the Muppet theater to refurbish the pizza place.