as far as the things you said i agree....but what is the connection with the dead spots??trere are 2 different things,,,completely..do you mean buzzing???
they are not completely separate ideas, just depends what you mean by a dead spot.
it can either be a dead spot because of resonance issues in the neck.
or it can be a dead spot caused by the string slightly catching uneven frets or not even registering as a separate note to the next fret along.
Demonx - i think your acoustic builder friend obviously has a lot of talent to be able to fret with a hammer and never have to level. but you have pinned down that even if you could do that, you wouldnt get the action you wanted for your guitars. it doesnt matter how much his sell for, the style of guitars you are making need to be capable of a low action and this will always involve a fret level (using standard fretting techniques, i am sure someone will invent a new system at some point)