In reality B A Lert; the real question is why is the movement rate 'capped' at 80 an hour?
I read somewhere that at conservatively the TAR/concrete available in the SY layout could easily do 105+ per hour, probably 120; without any significant increase in risk (in parallel modes). From my perspective we put them further apart than we used to do, to ensure we don't break 80...
That would be a better question than the specific target of AKL, FIJI, CCH departures from 34L.