This is why I get so frustrated at bad handling of Jason because he really does have a lot of potential. Moreso than Jason I in his way.
I love the ambiguity of the fall from the terrace. Part of me is like--how could that guy fall of the terrace anyway? No matter how spooked he was? But I like not seeing it obviously.
Winick sometimes makes things too obvious, but he does seem to get that Jason is basically Batman's creation. You didn't know he had a meanstreak? Bruce, you took him in because of the meanstreak it looks more like.
When he saw Dick he thought he was like himself because he'd just lost his parents die. They had things in common, but in other ways they were different. With the revamp of Dick's being fired it's like Bruce is feeling angry and so goes out to find an angry little buddy. Bruce doesn't seem to mind Jason taking his anger out on criminals even when it just makes him angrier. In fact, Bruce almost seems to be using Jason as a tool of his own anger against Dick at times, so it's no wonder Jason keeps feeding on it. If Dick reflected the joy Bruce repressed when his parents died, Jason reflected the part of him he struggled to keep in check, the desire to just clear the streets of all this stuff. (And without Dick around to for balance too.)
So yeah, totally prefer the non flash-back version that's more ambiguous. Especially since I think it feeds into Bruce's self-denial.