Increasing US and Canadian gateways would help a plan to use DUB as a hub for DXB bound traffic, especially as a carrier not part of the coalition of the willing or whatever it's called this week.
Premier traffic would also be helped by the fact that horsey people like the Sheikhs and the JP McManuses of this world might use the flight.
Great circle calculator says DUB-DXB is about the same distance as DUB-ORD so no problem for the 333 excepting issues with temperature at DXB allowing MTOW takeoff.
I'd like to see heavy 333s with IFE on all the existing US routes (incl LAX) except maybe BWI, the 332s with IFE for Canada, BWI and DXB route proving and the old 333s for bucket and spade work and cargo.
I would not underestimate Airbus' desire to keep what they hold, especially to keep down 7E7 sales in Europe to 33x customers.