I'm a bit conflicted on how I feel about the way the data on stats is presented.
I like the fact that you don't give too much weight to weights (eheh), because they serve no more than a linear predictor in a neighborhood.
At the same time I fear that stat goals could be misinterpreted all the same, because they are actually saying "hey, you know, as an info, 95% of the best combinations lie here!" but not "you should always definitely aim for this!" because of actives, set bonuses etc.
However, if you decide to give them such a central spot in the presentation of the best in bags/slots, I think they deserve to be presented in a way that is rapid to compare to the actual pc stats, e.g. in the way ddcorkum proposed, otherwise the comparation will always be clunky because we'll need to mouse-hover on the right column to see our stats, and see by eye where we are standing on the chart.
I see your point, that creating an hit-miss mark on the chart could make the false impression that best in bags combinations that miss the colored zone are "wrong" or "bugs", but I think the community would be best served by understanding that "all truth lies in simulation" and that stat goals, even if more comprehensive than stat weights (i.e. "truer" outside of a neighborhood of your actual stats), are NOT the only side of the coin, while still giving a more complete presentation to data.