9 across Y seat across the entire cabin, that's a nightmare.
Would love to hear those people that claim seat width don't matter have to say about a 16.5 inch width seat.
I flew 5J's A330 a few weeks ago. It was my first time on a 9-abreast A330 and it was not possible to sit naturally with hands on my thighs without my arms resting on the armrests. The return leg was a 5J A320 with wider seats where I could lower my arms comfortably without touching the armrests at all. On the A330, you'll really be rubbing elbow-to-elbow with the person next to you.
But hey, if people don't mind it and can pay the lower fare, power to them!
Interestingly, the lack of bulkheads on 5J's A330 made the cabin feel airier than usual, and you can see the front from the rear easily.