Yeah...it'd be interesting to see similar shot charts that give standard deviations above/below the expected field goal percentage of the actual players guarded. It's probably also worth mentioning that Millsap's high foul rate helps him here. That is, his aggressive defense makes his defensive FG% look good, but also gives opponents more free throws and limits Millsap's minutes/role.
Yah, true... That's something I've noticed too. He fouls a lot(4.8 per 36, damn that really is a ton), but I'm not sure if most of his fouls are on shots(i.e. resulting in free throws)? The next highest on the Jazz(from regular rotation) are Rodney at 4 per 36(that's a lot too) and Favors at 3.3 per 36. I wonder if some of it is the "rookie treatment" by refs and if we might expect those to drop a bit simply by them becoming more recognizable names in the league and then by some more by them getting experience and learning how to avoid some of those fouls.
How about exum's?
Interestingly enough, Dante and Rodney's defensive shot charts are not as good as we might expect:
Do you see the area around the right elbow for Dante? I think this one is misleading, I remember at least 3 extremely well defended shots, prayers, from opponents there that simply went in... and would probably miss 9/10 times(there was one against the Nuggets, one against Young of the Nets, one banked shot against ... the Kings if I'm not mistaken). Again, as GVC noted - it'd be interesting to see some error bars on those, but I don't think they are available.
Rodney's allowed eFG% is 53%, and Dante's is 52%.
For what is worth, from my searches through the database, it seems like being a great perimeter defender(I kind of hesitate to use that word when it comes to those stats specifically, because it's more a stat about contesting shots than overall defense... maybe perimeter contester would be more appropriate) is harder than being a great defensive big. There are a ton of bad perimeter defenders and not so many bad bigs(I would guess them not having to defend the 3 as much and defending worse 3p shooters has something to do with it).
BTW Trevor Booker comes out as pretty good at contesting shots pretty much everywhere(except corner 3s) on the floor(not only in the restricted area, where his efficiency might be influenced by the presence of Rudy and Favors). His allowed eFG is 45% - again pretty awesome.