Not only are LAN AKL-SYD-AKL flights being regularly cancelled, but their SCL-AKL-SCL flights (after they have already cancelled the SYD extension) are running very late. I suspect this will continue while their 787s are grounded and the rest of the fleet tries to fill the gaps.
I agree: avoid LAN at all costs. I had a problem with an electronic ticket in AKL last year (try to fix that at 5-am with uncooperative ground staff). And I flew SCL-AKL on LAN 10/26 in J. I'm still trying to get the miles posted to my account.