To me, I don't feel as if much from the montage was meant to be separate scenes. Or maybe that is just my own opinion, that if they really had full scenes of such clips, the film would be too literal and too bogged down. I felt that that part was perfect the way it was, seeing Barnabas adjust to the time and to the family.
However, I do sense that there was, or should've been, slightly more to the Julia/Barnabas and David/Barnabas relationships. And Roger was almost a throw-away character-- Jonny Lee was great with what he was given, but what he was given wasn't much, unfortunately.
My sense of Vicki at the end, based on only one viewing, was that Vicki was "herself" by the end, and she was jumping because she knew she couldn't be with Barnabas as is, and she was relying on him to change her so they could be together. I'm not sure when Josette was "there"- whether she was there yet when Vicki was standing on the cliff or only later. But I didn't take it as a possession; simply an insight or understanding that they were one and the same (reincarnation; integration, what have you). It's a bit of semantics, maybe, but I guess I don't like the idea of Josette using or manipulating Vicki and so I choose not to interpret it that way, at least on only one viewing. I may change my mind when I watch again.