A couple of in flight suggestions:
1. On 777's when the middle door is the one opened by ground crew it would be nice if the economy section was held back until all J pax are off. The chaos of pax scrambling to be first in customs line creates confusion in the aisles with J pax still tying to get stuff down from the overhead bins and being run over by people rushing forward from the back.
2. On smaller planes in particular it would also be helpful if the FA's watched the overhead bins in J as I regularly see people seated further back stuffing their bags in the front cabin bins.
These issues are not purely AC ones as I see the same thing on other carriers but in general other *A carriers do hold back the Y section on long haul international flights. This would once more separate AC from the other carriers with their premium service levels.