I just see pixelisation in that pic, so it doesn't really solve anything. That said, we know that the ship was designed to be 300 metres, and the scale-up was a knee-jerk reaction to a handful of shots where JJ wanted the shuttlebay to be cavernous and not cramped. I say we take the ship as all sensible indications would seem to put it and ignore the shuttlebay and the ridiculous official size estimate.
Besides, it's Baz's model, and he can scale it any way he wants.