Thank God, someone's finally edited BB. It needed it.
But strangely, I think you cut too much. I would have left some of the training in and kept Ra's / Ducard. It's not accurate, but the film's a little too lean like this. THe main problem I have with the film is that it's just too overexplanatory, just like you said. But I think a lot of the material you cut could be kept just by streamlining the film. Maybe had him flash back to some of the training?