There is probably an element of optics -- maybe the largest element -- to shifting the meal service timings. It shows that "they are responding" to this event. But shifting the meal timings by many hours is going to wreak havoc with passenger comfort (especially as those meals are usually well-timed to the different time zones / potential jet lag / etc.)

I hope and expect that they will make further adjustments down the line. Moving a breakfast service up 5 hours before landing, when it was usually probably around 90 min to 2 hours prior, is just not going to cut it. Passengers need to maximise sleep and have a proper meal before arrival.