Hi seven,
I've been reading your quotes, and I have to say that I'm not totally convinced by them!
Yes sound is a very important thing in filmography, but this doesn't mean lypsinc, it might be music, it might be sound fx, sometimes words as you like, but these are only a plus to the sensations you want to trasmit with your animation, or your shoots.
Not everything speaks, let's say for a case an insect, an alien might speak an unknown language, so that the body and it's acting, (surely enriched by sound), has to do the big part!
Let's put it this way:
I have a character that has to be very angry and yells f.@ck with a smile on it's face, or with no expression or body movement.
On the other hand I have a character not speaking but stumping and making angry faces at me!
Which is more effective!
You can watch a short named "passing moments" at donphillipsjr.com, not done in A:M, but totally done without lypsinc or words, see how expressive are the two characters and then tell me!
As far as expressions I like to use the pose slider percent method, with muscular changes, they are simple don't need rigging, I only use jaw bones, and make good layering.
For the eyelids, eyebrows, I use the same method, and to turn the eyes all I do is create a null and make the eyebones aim at it!