I doubt you'd even notice it after driving for a week.
There are two different configurations for the 780 suspension: air all around, or leaf springs up front and air in back. The latter is the one I have and it makes a small difference in the lean. If I was to do it all over again, I'd go with all air in a heartbeat though for the nicer ride.
The smallish side boxes are a side effect of having the RV-style table in the rear. If you were certifiable you could keep the lower bunk made up as such and use the extra space in between for storage, but then that would defeat the purpose of having the nicest interior of any production truck out there
Jim