You're better than this(I think). I don't think any reasonable person expects him to become an offensive force overnight. The point is, not only is he showing more aggressiveness, but he has shown some elite ability in some of the moves he's made.
I need to learn how to pick out a play and post a video of it. There was a play against the Bulls when the score, I think, was about 12 to 5, where Exum drove to the rim in traffic, and used his length in a sweeping layup over/around several defenders that was a thing of beauty. Multiple reps for anyone who posts a video of that play, or even better, a highlight reel of Dante's last two games. That block at the rim on Portis should be included.