NBA 2K14 listed Diaw at 64 overall, while 2K15 will rate him at 78. After a 2013 playoff run showed glimpses of what Diaw can contribute to the Spurs, the 2014 version of Boris did all the little things the Spurs needed from their stretch big man to secure the title. Becoming another scoring threat added a new dimension to the Spurs offense.
The biggest criticism of Diaw's style of play heading into last season was his overwhelming instinct to pass, even if he had an open look to shoot. He found a way to make the fans and himself happy, by increasing both his points and assists per game this past year. His numbers went from 4.1 points, 2.5 rebounds and 1.8 assists per game in the 2013 postseason to 9.2 points, 4.8 rebounds and 3.4 assists per game during the championship run.
In Game 6 of the Western Conference Finals, Diaw took control and scored 26 points to defeat the Oklahoma City Thunder, 16 of which coming in the second half of the closeout game. Then he made his presence known on offense and defense in the Finals, putting up 6.2 points, 8.6 rebounds and 5.8 assists per game against the Miami Heat.
For 2K15, Diaw's use is basically as a tall guard who will thrive with any user whose team is three-point oriented. In need of a big man with great passing and shooting skills? Diaw is your guy.
Contributions to the 2014 championship came from across the roster, but it's difficult to imagine the Spurs raising trophy No. 5 without Diaw's improvements.
EDIT: The story previously stated Diaw is the most improved Spurs player in the game, but it will actually be Matt Bonner. Diaw will see the second biggest improvement.