>>723486407
Sorry, I didn't preface that the pic is a redesign that shows how the layout of each floor should look like so as to fit into the hull of the ship. The TL;DR version of it is that the elevator needs to move diagonally so as to actually lead you to various floors. The captain's cabin was pivoted by 180 degrees, the shuttle bay was drastically shortened, and the rest of the rooms are squished or stretched where needed.
They just needed someone to draw the cross-section of the ship or make a 3D model before finalizing the external design, like in picrel (it should be around the same length as SR2, but is much wider and bulkier).