Excellent post Suzeman, and you are absolutely right to emphasise the difference between the needs of business folk compared to more flexible leisure travellers in terms of the timing of flights.
I have to say I'm surprised that the 'off-peak' periods for departures includes 06.30-06.59 but then only 13.00-13.29 from late morning until 19.00.
LAX, thanks for the clarification on China rights. On that basis, I hope it is PVG that Hainan are reportedly planning, and you never know - Air China may eventually take up their PEK rights to MAN!