I was there this past week. The outside "looks" finished. Signs are up, etc. The first couple of days we were there, there was no activity. Only on one day did we see a couple of guys putting on what looked like some finishing touches to the exterior paint.
I took the Backstage Magic tour, and we went to the shop where they are making the seats for this ride. Don't know that I can describe them, but all 4 people will sit in one row and each person will sit right next to the others they are working with and their control panel is right in front of them. Each person will have their own responsibility. The shape of the seats is kind of like the doombuggies, except that it is enclosed in the front where the doombuggy is open and it is only open on the side where you get in. Kind of like the old Horizon seats, but the front is closed in and you enter from the side and not from the middle front. Hope that is not too confusing. The seat or module or pod or whatever it will be called is all white on its exterior.