Geoffers,
I just think its a bit strong to say you should never use fly-through. EG.: I find it the perfect way to fly a manual ILS. Gentle pressure against the cyclic for a couple of seconds then release is a much easier way of making a 1 or 2 degree heading correction than by using either of the other techniques.
You just need to use it at appropriate times!
I think the FCOM is in hand, but it is a massive undertaking for the poor bloke who has to write it! Probs be a while yet!!