I took that big A380 SYD-DXB back in 2009. The flight was oversold in Y, so they bumped some pax up to J to free up the last row, center section, middle seat for me for the 15 hour flight. I have to say it was pretty miserable to sit there, but I got to fly from SYD-DXB, on the A380, w/ great service, and an FA was nice enough to walk me through the upper deck and the shower.......but didn't want to hop in w/ me........anyway, all that for like 120USD, so can't complain.

You will not get upgraded on EK......For Qatar, A friend of mine is a 777 CA there, and he told me only CA get upgraded to F when nonrevving, FO and below can only get Y or J......I'm pretty sure OAL is only Y.

I haven't checked a bag in years, so can't tell you about allowance, but I'm thinking its probably minimal. Also Biz Casual is minimum dress..