I agree he isn't what he used to be, but make no mistake, when he gets in triple threat position out on the wing, he is still a ridiculously deadly scorer, definitely more so than you seem to think. They just don't use it much because there isn't a frequent need for him to do it like in the past. They have a good offense and lots of people who can score in different ways. Also, Dirk is capable of finding ways to score off the ball, while some of the other players (like Ellis, Harris, and VC) aren't. So its more beneficial for team chemistry for Dirk to have less iso's. But most every time he has had a wing iso play ran for him in this series, he scored without much trouble.