In terms for UX, it is better to have a sense of your content. To visually see the content, where it is coming from and going back to it’s original place.
In current state, No matter how many images in a gallery (say 4X4), the image will only popup from the centre.
For instance, compare the app open animations of Android and iOS. on. iOS, it’s much more fluid and open’s right from the app icon, unlike Android which opens app from centre/bottom of the screen no matter where the app is actually located on the display.
That aspect makes the new-lightboxit more intuitive.
I am not sure it’s that big of a factor. That’s just my humble opinion.