I am very enthusiastic about visiting worlds in the stories that card sets are not currently on. This means I don't need to hold out for a standard-legal visit to Theros (although I want one desperately), Kamigawa or Lorwyn to get a glimpse of these worlds and how the stories are shaping up there. It's also a great opportunity to check in with characters such as Kiora. I hope we see more of Theros soon, and we return all the same. But until then, I'll take a glimpse or two of the world.
Some repetitions could be emphasis. Jace finishing the bowl in two minutes could have a lot to do with being threatened, for example, in addition to being hungry. I suspect the scene went with Vraska pouring him food, her issuing him that threat, and while doing so, Jace scarfed it down mid-sentence, uncharacteristically.