Regarding the par 3s, I agree that 6 has a spectacular setting, but the green and surrounds do not quite live up to the scenery. Still, the angle from the back tees make for an exhilerating tee shot.
17 was out of play, but the semi-blind, mid-length par 3 concept certainly led to a raised eyebrow. 11 is pretty good. I don't detest 2 as much as some of the others that have chimed in so far.
Really, as a set, the par 3's at NSWGC do not really compare to the less scenic, but much better-conceived short holes throughout the sandbelt. I prefer the 1-shotters, as a groups, at RM, Victoria, Woodlands, Peninsula, Yarra Yarra, Kingston Heath, and maybe even Metropolitan. The simply have a greater variety of recovery shots and better putting contours.
This isn't a knock on NSWGC, but rather a testament to the bevy of excellent short holes around Melbourne.