But this is SPORTS! It’s not about art, it’s about WINNING! yYou have to have a score of some kind.
Obviously you can quantify wins.
It's impossible to quantify a person.
I'll give you an example. Back in 2002 Curt Schilling and Randy Johnson were dominant pitchers. So who should have won the MVP? Randy had a slight edge on the numbers, which led him to win the award.
However, Randy mostly kept to himself. While dominant himself, he never directly made anyone else around him better.
Curt, on the other hand, was constantly helping other players with their game. Numerous pitchers credit Curt for all the insight he gave them to hone their craft. So in essence, Curt made everyone else around him better.
So Randy's numbers were dominant, but Curt made everyone else better while still having slightly less dominant numbers. So which one was more vital to the team's success?
*Back to the Suns.
I was at the Philly game. While everyone else was watching the time out entertainment I was watching the bench. Namely Tyson Chandler. That guy is coaching up a storm. During one time out he and Devin were engaged in this deep discussion on the intricacies of a play. It looked like they were talking about how to react to Philly's D on the pick and roll, but I couldn't hear of course. A few plays later, Tyson set a screen for Devin and instead of driving like he had been he jab stepped, made the defender hesitate, and drilled a 3. After the play Philly called a TO and Devin went up and shugged Tyson. They both had massive smiles on their face, but Devin's face was saying "you were right" while Tyson's was saying "I told you so". It was a cool thing to witness. Tyson, for example, is bringing a whole lot more to the team than just rebounds and defense.
You can look at the numbers exclusively but you might miss out on the beauty of relationships.