You should give the A320 service a try,
B-HXB - you may be pleasantly surprised. The seats are ultra wide and very comfy; there's a nice smell of new leather; catering is back to its normal standards (though some would argue that quantities are down - personally I didn't notice that); and the pitch is absolutely fine for that length of flight - the only drawback is that recline is not particularly impressive if you are wanting to sleep. I was certainly not aware of anyone from Y coming forward into the J cabin - the curtain was kept firmly closed at all times. The only intrusion was me stumbling drunkenly into the Y cabin... but that's another story!
