I am not currently flying the N3 on operations, but my colleagues who do use to say they don't like this 365 NR mode since it brings the torque near the limit.....
I always have found this a little strange, since normally at a given power if we increase NR, Torque should decrease and N1 increase. It seems to be what we are looking at when torque limited.
Now, in increasing to 365NR we maybe loose a little bit in main rotor efficiency (when we gain in inertia and tail rotor effectivness)
Could it be the resultant of all these effects that make this torque increase instead of a decrease, or is it just a short temporary increase before a stabilisation at a lower value (as we can observe on 365N/N2 when we "play" with variations in NR ?