Disney is doing whatever they want. Hyperspace travel is speed of plot, and as long as it is dramatically appropriate, gravity wells don't matter. Everyone has holonet communications and you can have real-time conversations across the galaxy, and even while in hyperspace with just a wrist comm
To be fair, hyperspace has always been "at speed of plot", this isn't unique to Force Awakens or Rogue One, or Star Wars itself.
I've never recalled them ever worrying about gravity wells before, but I don't recall anything in Rogue One that suggested they didn't understand gravity. If you are referring to the scene where the rebel ship rammed the other, and it shoved it into another, and they fell to the planet surface, seemed perfectly reasonable to me. Given inertia of the push, and the mass of the ships and all that.
And let's not forget that real-time conversations across the galaxy was established as far back as Empire Strikes Back, when Vader spoke to the Emperor, and the prequel trilogy had Obi-Wan speaking to Coruscant from Kamino, or however they spell it. So Rogue One isn't really breaking any established rules, they're following ones that have already been established for decades.