As a controller, I agree with you 100% on all points. Communication is woven a lot more into safety than people realize.
My problem is not LUAW, it's the agency implementation of it.
For starters, the phraseology adivising an arrival there is an aircraft in position was not changed to coincide. As a result you will get "line up and wait" on the ground, but will still get "traffic holding in position" in the air. They scratched one line and replaced it, but didn't follow through with the rest. Causing more confusion than fixing? Time will tell...
Secondly, and more importantly in my opinion, the agency made themselves a video to put out to pilots regarding LUAW. After it was done, it was given to the union's National Runway Safety Action Team. And shockingly enough, there is a phraseology error in the video-the one made to you know, educate pilots about phraseology. I won't go so far as to post the agency response on a public website, but if you have been around this business for more than a day you can probably guess what it was...