It might be hard to see what is different but there are changes.
The upper half of the back (or forward) wall, the domed part, has been angled in about fifteen degrees. You can see the extensions of the observation deck on three sides that allow for an easier view into the hangar bay proper. You can also see some of the detail of corridor and archways I've added. I've still yet to odd the observation windows. You can also see the control rooms with access doors from the observation deck. At the back of each control room will be another door that accesses a gangway down to the flight deck wherein you will enter the bay through a door in the side of the berthing alcove (not yet added).
Another small change not immediately noticeable is that I've shortened the flight deck three feet and I've narrowed it about six feet. I felt I had originally allowed a bit more room than I really need in the shuttlecraft berthing alcoves. To give you some sense of scale the ceilings of the observation deck are eight feet while the doorways are six and a half feet.
I have yet to add the airlook adjacent to the main bay doors where the only depressurization occors. The side walls and ceiling of the airlock will be transparant and the end of the airlock on the flight deck will be a solid ring like structure that also visually denotes where the forcefield engages separating the airlock from the rest of the bay, somewhat similar to what was seen on TNG.
When a shuttlecraft departs it is moved into the airlock whereupon the airlock's forcefield is engaged. The airlock is depressurizrd then the bay doors open allowing the craft to exit. After the craft is clear the bay doors close and the airlock forcefield is disengaged. For an arriving craft the procedure is simply reversed. Despite the safety record and reliability of the airlock forcefield as a final safety measure it is standard procedure that the entire flight deck is vacated during vehicle arrivals and departures.
The bay doors are not accordion style as they are on the TOS
E, but rather simply two large curved panels that retract into each side of the clamshell hull.