What is wrong with the term overpitching for the situation Nick describes, where the collective position writes a cheque that the engine power can't cash - the Nr will slow down unless the lever is lowered but if you lower the lever you will go down faster. It is a no win situation and can be avoided by doing the sums to ensure you have an adequate power margin for landing/hovering - the standard in Brit Mil Ops is HOGE plus a 5% Thrust Margin to counter slight turbulence/ mishandling/ windshear etc
We do not use the term settling with power or power settling in UK and therefore avoid the confusion. VRS is VRS, running out of power is running out of power - c'est tout ca! Recirculation (just at the tips due to obstacles not at the root as well like VRS) can cause you to run out of power because it increases your induced flow, but you have still run out of power. If your engines torque/temp/fuel flow limit the Nr will decay (overpitching)- if they do not you will overtorque/temp (bollocking from the boss).