I like this idea A LOT...combination of draft spot, average draft spot, and calculated player rating to come up with an overall draft value! All those pieces are important to understand.
I would suggest to use a "trimmed" average for ADP.
I was using those same factors to make draft and trade decisions, particularly as I got more comfortable during the draft. I asked myself, "who do I want now (player ratings), can I wait to get them (ADP), and should I trade my pick because its more or less valuable to me right now (draft position)?". For example, I thought Ray Ferraro was a very good player, worthy of my 6th pick, based on player rating. However, his ADP was somewhere in the 9th rd, so I waited until then to draft him. I instead used my pick on Hynes, who despite his dismal rating, I wanted on my team and had to take him then because he would not be around later.
One thing I thought of during this draft more that I hadn't considered as much before is scarcity of an attribute, or particular set of attributes. Given our pool of players doesn't change, it's easy to identify some special players. Like hokkee mentioned above, there are only 2 guys with 3 weight (Fleury and Kovalenko), which makes them a little more special than the straight rating suggests. What makes Roy and Belfour 1st round picks? Scarcity of elite goaltending. If we had 24 similar goalies, we would all be drafting goalies in the 5th and 6th rounds. And so on. Having said that, I believe ADP factors that scarcity in.
Anyway, I'd love to see those results....perhaps applied to our GDL09 trades. I think this new metric would be a good indicator of trade value.