I last flew EK in 2004 and am still waiting for a refund as a result of a "downgrade" from Business to economy due to an overbooked aircraft. We were lucky as a crew to be seated in an exit row so leg room wasn't a problem, but we refused to move once seated as the CC wanted to put a family with tiny kids in those seats before departure (a class one emergency exit, with all that implies) for the rest of the flight the CC ignored us totally to the extent that we couldn't even get a glass of water on a Dubai-Gatwick flight. I've never flown EK since and we won't use them to position crews either.
Flew Oman Air last year and they were magnificent, no doubt there is some form of tie up between the two, but Oman Air now get a lot of business from us.