My biggest problem with defensive stats is that we like to use them to make a case, but we ignore them in favor of offensive stats when it suits us. IMO that's mostly because deep down we know that defensive stats aren't as accurate as the offensive ones.
When most people talk about a player they talk about his offense. His slash line. And defense barely gets mentioned. Even in the case of JBJ, when he was struggling to stay above the Mendoza line, very few of US were talking about how much of his stellar defense offset his offensive shortcomings.
I see from Moon's post that JBJ is 6th in UZR. The fact aside that I want to see five guys in MLB who have better range than JBJ, that's ONLY UZR that's being talked about and JBJ leads the league in OF assists. Doesn't that move him up some on the chart?
When we can put both offense and defense on a scale of, say, 1-100 and say that JBJ has an offensive rating of 85 and a defensive rating of 91 - and start talking about players whose defense is better than their offense like it matters (because it does!) I'll be a little more willing to consider defensive stats.
And please don't talk to me about WAR. Have you even seen the "formula" for WAR? It reminds me of a 6'7" pitcher with control problems. He has a big motion and there's a lot that can go wrong in there, and often times when there are a lot of different things that can go wrong something often does. I believe in KISS. Keep it simple, stupid. When two sites can determine a player's WAR and even THEY don't agree, how are we supposed to have any faith in it?