Problems I have with the list so far:
Louis Williams being anywhere near the top 100.
DeAndre Jordan (see Louis Williams).
Nicolas Batum at 81 is based on the recurring thought that he is going to have a breakout year. Yet we keep waiting and waiting.
Andrea Bargnani at 65. Offense must count for a lot, huh?
I think you have to consider them as "players" not simply how they fill their roles on their current teams. For instance, while Shane Battier would be a better 6th/7th man on a contending team than Lou Williams.... Lou Williams would be a far better player to have as a starter on a team deprived of players who can create offense. I'd still agree with Battier being a better overall player, but
Regarding Bargnani, well, offense is half the game and the part that players have more control over normally. And he showed to be a fairly efficient scorer at a decently high volume as a #2 option in 2009-10 (TS% .552)
Regarding Bargnani, if he was a guard...fine. But he isn't. He's huge and doesn't rebound, play defense very well, pass very well, or have any post game.
He's a center with the skills of an okay SG and without the skills of being a center, who gets his shot off because teams are reluctant to send their big men that far out of the paint to cover him. If he was 5 inches shorter he would be playing his career in Europe as a mediocre SG/SF.
65 is way way too high.
I agree that he has the skills of a SG and that teams are reluctant to send their big men that far out of the paint to cover him. But I don't see how that's a fault of his... I think that's what makes him special and a tough cover. The "if he was 5 inches shorter he wouldn't be in the nba" argument could be made about virtually every C and PF in the league, so I think that's a crap argument. He's not 5 inches shorter and his height is part of what makes him a special player.
Also, your calling Bargnagni a center because he's 7 feet tall and plays center for the Raptors. But if played Dirk at center, he would be just as bad at those things you are calling Bargs out for. Dirk has just had the fortune of not being played at center and furthermore playing alongside good defensive and rebounding centers, while Bargs has not. So, I think it's important to consider the players as players and not how they produce in their current system.
I do agree with your skill assessments, but 2 years ago, many could have criticized Dirk heavily for those things (he has improved since, especially in passing IMO) yet still would have considered him a top 15 player. The reason: offense is a very important part of the game. So, while Bargs is not on Dirk's level, he is a similar player and I personally don't think 65 is too crazy.
Wait, my argument is a crap argument but you are trying to compare Andrea Bargnani to Dirk Nowitzki?
Bargnani is 7 feet tall and has been the absolute worst rebounding 7 footer in the league since he was drafted. His per36 rebounding numbers are routinely in the 5-5.5 range and he has trouble getting his rebounding percentage above 9%, which is so bad it ranks only slightly higher than most PGs.
Dirk had through most of his career per36 rebounding numbers in the 7-8 range, rebounded over 9 RPG for 5 straight years and has consistently had rebounding %'s in the 13-15% range.
Bargnani has never broken the 1.8 number in assists per36. Dirk is usually in the 2.5-3.0 range for that stat. Also, in using the litmus test of watching the two, Dirk is a much more willful and talented passer.
I am not even going to get into the details of the defense both play, the under the basket game or back to the basket game they play, the ability to shoot at high efficiency or the ability to handle the ball and create one's own shot which all are clearly in favor of Dirk by a wide margin.
Sorry, action, 7 footers have a higher responsibility to their team than to hang around 20-23 feet from the basket waiting for the ball to be thrown to them so they can shoot and do nothing else. And that is pretty much Bargs' game. 65 is too high.