MCC was literally 4.5 games in one, of course if was gigantic. Not sure why AW was so big, I imagine it's due to just MUH GRAPHICS, but as a counterpoint, Borderlands: The Pre-Sequel on Xbox One is only 10 gigs, and Rayman Legends is about 8 gigs. Typically you only see the graphics-heavy BIG NAME titles with large download sizes on the One. 14 gigs seems odd for a sprite-based fighter.
Also the Forza Standalone thing for Furious 7 was like 3 gigs, but of course that wasn't a very large title to begin with.
The OD versions of the DDs are still using the exact same sprites and assets already in the base game, it's not going to bloat the game up like that. And I'd hope the cutscenes aren't using up that much space.