Does anyone know if the beverage options for rapid fill are generally the same at every resort? Other than soda, what are the other choices? Specifically coffee choices. Trying to find out if it’s worth the purchase for my trip!
Staying at POFQ if that helps 
POFQ has the freestyle coke machines - not all resorts do. But we don’t drink coffee so I can’t help you there.
Last time we were at POFQ in April they had coffee–regular and decaf as well as tea. And then as @missoverexcited said they have Coke Freestyle machines which have many cold drink choices–not just soda.