If you color matched the powder coat I am not sure you could tell it was not stock unless you saw a stock one next to it. There is a LOT more clearance in the rear.
The spare will fit. I opted to remove the spare mechanism as I am getting the tire carrier. I will let ACC expand on this because I don't know how much had to be removed for fitment vs. function of the stock spare.
You remove the bumper cover and some of the plastics underneath (vent cover, etc). I removed flares so this is fitted to that line, but ACC is planning to offer one that will fit with flares on.
It bolts on. If you want the hitch there is a hole that needs to be made in the rear cross member to accommodate. You could also refit the stock hitch, but not sure if the lower clearance is enough to allow for the tube to fit underneath (it was recessed into the cross member a bit stock as I remember).
The bumper can be bought this way, but ultimately the production model options are up to ACC. They can make anything work as a custom build.
Swing outs: I am not sure on what ACC has planned, but the design I think we are heading toward for tire carrier is a simple tap and bolt system that allows for add on of the swing outs at a later date. Will know more on that in a week or two as it gets finished and we get more done.