EY service is very inconsistent that's for sure regardless if its a reward flight or not so hopefully you're not too upset about it. From my J class experience flights to LHR is very inconsistent but to other destinations - MUC, DUB, PEK, KTM for instance service is incredible despite J class being full. In economy its slightly different - flights to and from London weirdly is never the best, despite this being their 'flagship route - hence the A380'. It's lately being filled with inexperienced crew who clearly is incompetent I must say. My best experience has always been flights going into Asian destinations such as KUL and NRT. These flights have a higher ratio of crew from carriers such as MH and ANA. It makes a world of difference. lol..