Never say never right- well I am saying NEVER ! We were in MK on Dec 20th a few years ago, on the last day of a 10 day trip, the difference from Dec 10, to the 20th was astounding. I know it just gets worse, parks can and do close as early as 11, because of crowds, waiting 30 minutes for a bathroom, not for us.
If you do get free dining it might be difficult to get any ADRs, not impossible yet but difficult.