Remember how well Starlight imagining herself in a holiday story worked for making her come around about the love and warmth of a day like Hearthswarming?
Who's to say a similar tactic couldn't be employed with more hardened villains...like a certain fallen changeling queen? Even if it's nowhere near the holiday season in Equestria, a little yuletide story never hurt everypony (especially not one with a great narrator).
Reforming shenanigans with a holiday twist--a last minute present from me to you! Enjoy!