For all the talk about how dikk was acting like Jason that's been going on, I'm glad we had this episode to show the differences between the two characters. This show's dikk is angry and violent, but it's less about resembling Jason and more about the crossroads he is at in life. Everyone wants happy go lucky dikk, but he's not there right now. Instead, we're meeting him when he's at something of a low point. He doesn't know who he is, and he is harboring a deep resentment to the closest thing he has to a family right now.
What became clear to me during this episode while Jason was grilling dikk was that regardless of whatever cause dikk and Bruce to fall out, dikk is simply using Bruce as a scapegoat for his problems. dikk loved being Robin, and as Jason noted, probably still wants to be despite what he says. However, he's still holding onto the anger from his parents' murder and is aiming that at Bruce. Even Kori has noted that dikk doesn't want to actually deal with his problems.
Leading the Titans will obviously be the thing that leads to dikk actually getting his shyt together, and probably have him make the transition to Nightwing.