I was recently able to get two Business Class award seats (on the same flight) between HNL and SYD using DL miles.

From what I could see there were two business seats available each day (3X a week service) made available at the 331-day mark at about 1:30 a.m. ET.

If there are seats available they are in the Low category. So it is Low or nothing and no medium or high.

Being that there are only 18 seats up front I would expect that once these seats are gone that's it.

Also, South Pacific is no longer on the published DL award chart but it is still 150,000 miles per ticket in Business/First as long as all the segments are in the Low category