I agree somewhat, however I understand (from talking to others – not first hand) that the “atmosphere” is more pleasant – more humid? better circulation, pressure? Allegedly it is also far smoother. Some CC are ambivalent, others have expressed that they certainly do not feel as tired.
I recall a year or so ago Martyn you commented on a lingering sore-throat etc. One wonders if an A380 would have been a better or worse for this?