Yes, I understood that for all she could see her family (particularly her father) were distraught, she could do nothing. Many people have commented on the bit where she uses her one and only chance to 'come back to earth' to sleep with Ray, rather than letting everyone know where her killer is, but I think that was done just right. Had she told someone where her killer was, everyone's lives would have been changed forever, and I don't think one (dead or alive) person has that ability, I agree with you on that. One thing she did want desperately, and something that didn't interfere with someone else's free will, was to sleep with Ray. But still, there was no hope or inspiration about it. Maybe she was 'at peace' in her heaven, my impression is that she wasn't, but even if she was, it's a bit of an apathetic existence.