2018 Quick Service Dining Plan- Substitutions?

We have a trip coming up in December and have the quick service meal plan. It’s been a few years since we’ve been and there have been many changes to the 2018 dining plans. Will we be able to substitute the included drink for a side or dessert instead? I have read contradicting info on this: some say yes and others that it is no longer acceptable. Thank you!

I’m interested to know this too since we have the QS dining plan for our next trip!