This version has 221 songs and over 60 characters from the first 14 FF games in addition to side games like Mystic Quest, Crystal Chronicles, Type-0, Lightning Returns, and more!
So yeah it'll definitely be worth it. DLC has already been confirmed, though right now it appears to just be from Romancing SaGa 3.
Also have fun creating a temporal paradox by having both FFX Yuna and X-2 Yuna in your party, since the game treats them as separate characters! But don't worry, Serah and Noel are also in the game so they can clean up whatever paradox this might cause.