Wannabee I operate the 777W into NRT close to MLW on a fairly regular basis and am aware of the notam, using F25 adds 7kts or so to the VREF and then unless you want to run into potential issues with hot brakes you end up having to use full reverse, making a heap of noise..but keeping the brakes cool. Or you use F30 with a corresponding reduction in brake energy. Airport authorities can promulgate what the would like for as long as they like, the reality however seldom matches the theory.
For those observing different operators' application of configuration/stabilisation in a B77W at or close to MLW full configuration is required to achieve 160/4. So for their may be a slight improvement with the 3.2. Though not on a lower than ISA day!
You can use F25 to comply with 160/4 then configure to F30 at about 5 miles, and be fully stable at VREF + 5 at 1200 AGL, I did it today in ISA + 20 conditions, its no drama at all, but it is a noisy way to do it, 170/5 works waaaay better at F15.