yeah, apparently the EK 777's are hell in Y because they cram an extra seat in each row... ouchie.
the two main complaints about the 757 are that there is only one aisle, so when the meal service is going on, its hard to get to a lav, and you'd have to jump over 2 pax.
The meal service doesn't take that much time, and given that they fly these on all sorts of domestic routes, people don't seem to mind that much that they still do meal service on those! Its just such a small percentage of the time in the air, it doesn't matter that much.