Personally, if staff were of the opinion that they wanted to get rid of value discussion then value lists in trade threads make no sense.
I was of the opinion that I wouldn't have one, but my hand was forced from the number of times people would whisper me ingame with shit offers and reference some shit shiny trader who posted a list of bias values, claiming that was the source of their information.
I also get spammed day in, day out with people asking me values. This way I can just direct them to my thread should they want my values. However I feel this has clearly been taken advantage of by many, and you have players that have created trade threads with shit commons just to spam their values.
Let the live trade market and the GTL decide value would be my opinion. It's just contradictory having value lists in threads. And this coming from a guy who has the most viewed thread in trade corner history and who's values clearly get the most views.
Just my two cents on this anyway.