IME doing the flight Sunday night, really early Monday morning, I slept through the midflight meal and breakfast (really more like brunch?) was served about two hours before scheduled arrival. Then the FAs, including the purser, disappeared into the galley jumpseats and stopped responding to call buttons; they seemed annoyed that paying passengers in D1 might disturb them by requesting something during the last 90 minutes or so of the flight. My flight was on time and in fact scheduled to arrive early. FAs similarly seemed annoyed when I woke up after the midflight snack service and grabbed something from the snack basket in the galley.

It was a disappointing crew, but I can imagine that the schedule isn't attractive to FAs unless they want to spend a day in Seoul.

To me, having the purser confirm my preordered meal (which indeed did happen on my DL 27 flight too) is one of the minimal things I would expect on every D1 flight with a preorder option, and not an indication of a great crew or great service.