Honestly, I don't see the radical changes folks are talking about. Is the captain's chair still in the middle of the bridge, facing the viewscreen? Are the helm and navigation stations still in roughly the same place? Is the basic layout the same? Does the Enterprise still have a saucer and two nacelles in more or less the same places? Sounds like the Enterprise to me. I'm not going to lose sleep over whether the guardrails are exactly the same color or if all the blinky lights in the background are in the same place. It's not as though they swapped out a Star Trek ship for the Millennium Falcon or the Battlestar Galactica. It's still recognizably a Star Trekky spaceship. And as for the precise physical dimensions . . . how often does it really matter, plot-wise, if a ship is 430 or 378 meters long? Most of the time we just get an establishing of shot of a big shiny ship in space, which is good enough to get the idea across. When was the last time you heard dialogue such as: "Bad news, Captain! The alien tractor beam is just big enough to capture the entire ship, all 386 meters of her!" "Blast it. If only the radius of our saucer section was 16.2 meters wider! That would make all the difference!"