Perhaps each window is 2 decks long?
These are the same style windows as on the Galaxy class saucer. They seem to stretch across the height of an entire deck, and recall that most of the ships we've seen over the years weren't designed from the ground up with maintenance tubes in between the decks as the Sovereign class was. I would guess then that the Akira class doesn't have any Jefferies Tubes between its decks either.
Personally, I think the textures so far look awesome! The best I've seen on a BC Akira model to date.