I don't know if this deservers a new thread, so I put it here : http://www.reuters.com/article/us-emira ... ce=twitter
"Airbus (AIR.PA) is working on increasing the capacity of its A350-900 aircraft...by moving the pressure bulkhead back by two and a half feet and changing the rest of the layout to leave more space for seats."
Interesting stuff. If they move the doors 4 accordingly (expensive option) they pretty much gain one seat row. Since the fuselage is narrowing there, they probably get 2-3-2 for a total of 7Y. If they don't move the doors, they could put 2 more lavs or a few galley compartments behind doors 4 to gain probably 6Y.
And then there is , of course, the question WHY they didn't put the bulkhead as far back as possible from the beginning? Not the first time Airbus moved a pressure bulkhead, btw. They did it for the A310 from the A300 and later the A300-600 got that, as well.