I agree with you on most of your points. However, you are really wasting your time posting logical thoughts about the PVT. There's a group of people on this board that have made up their minds that it is a negative, waste of time and no more accurate than a magic 8 ball.
I thoroughly disagree on the matter.
I personally had a positive experience using the PVT, both before and after it changed, but that is just cast aside as dumb luck.