The object of reducing noise on approach, IMHOm is to reduce the noise effect to the highest number of people. I still suggest that this can better be achieved by starting at higher platform height rather than a steeper approach from a lower height. Given ATC's perquisite to control a/c so they intercept from below this can lead to some pilots dragging it in. Leaving a STAR (IAF) fix from 6000' on a continuous descent, possibly with LOC & G.S. intercept close together at 10nm, with gear down no earlier than 5nm, would create a low noise foot-print. This is what we did on very basic B732 with no radar; so surely in today's wizz-bang all bells & whistles a/c it should be a doddle. Tinkering with the last 6-8nm seems a sticking plaster on a more serious problem.