Here's my calculations I did on excel to see what the impact on Mileage Plus members by switching to NZ AKL-SFO non-stop:

1P+ (100% bonus):
Miles RDM EQM Elite
SFO-SYD 7417 1854 3709 7417
SYD-AKL 1354 339 0 0
AKL-SFO 6514 1629 0 0

SFO-SYD-AKL-SYD-SFO 36762 / 24959 (RDM/EQM)
SFO-SYD-AKL-SFO 26253 / 18994 (RDM/EQM)

2P (25% bonus):
Miles RDM EQM Elite
SFO-SYD 7417 1854 3709 1854
SYD-AKL 1354 339 0 0
AKL-SFO 6514 1629 0 0

SFO-SYD-AKL-SYD-SFO 25636 / 24959 (RDM/EQM)
SFO-SYD-AKL-SFO 20961 / 18994 (RDM/EQM)

Non-elite:
Miles RDM EQM Elite
SFO-SYD 7417 1854 3709 0
SYD-AKL 1354 339 0 0
AKL-SFO 6514 1629 0 0

SFO-SYD-AKL-SYD-SFO 21928 / 24959 (RDM/EQM)
SFO-SYD-AKL-SFO 19106 / 18994 (RDM/EQM)


It appears all MP levels lose about 6k EQM. For RDM, non-elite lose 2k, 2P lose 4.5k, and 1P+ lose 10k.

As 2P I don't mind losing 6k EQM and 4.5k RDM. It'll give me an extra day in NZ this way (leave night flight AKL-SFO instead of morning AKL-SYD)

Updated for actual mileage quoted by UA and NZ, and rounding traditionally.