2-3-2 would be great but no way can a twin aisle airplane be a as fuel efficient as a single aisle airplane like the A321neo. It is just plain fuselage drag. So operators would have to...
Sometimes it is good to be the market trailer, re B707 and the Comet.
It is painfully obvious that deliveries of some wide-body aircraft will be deferred with the price of oil low and the economic slowdown virtually everywhere.
Its either incompetence or don'f bother, it;s only government work, check Boeing on the incompatible wiring for the C-46 tanker.