I agree with what you are saying crab - speed control is the key. The students who get it wrong are the ones who are not scanning the airspeed constantly.
A slight variation on the technique, which seems to work well in my experience:
Start as already discussed, ideally nose slightly left, and as you approach the landing area, adjust the speed carefully until it is stabilised with the nose straight and with the aircraft flying maybe 10 or 20 feet above the runway. At this point, be prepared to change your brain to think about steering with the collective. If you pull up- nose goes right ( in normal helos!) if you push down, nose goes left.
To initiate the descent for the last 10 or 20 feet, just raise the nose a tad, and as the speed washes off, the helo will descend. You just need to keep steering with the collective as you touch the runway with the main wheels. If you hold the nose up off the ground, you will brake aerodynamically until the nose falls naturally, and you can slowly lower the collective.