I want to know a lot more about Kabr as well. Sadly the history we know about Kabr leaves a lot of unanswered questions, is kinda broken bits of info, and is open to interpretation with vague descriptions. I still believe his Ghost is in there to be found since the Vex took it. We may be seeing more from the VOG in the future and hopefully we get more answers on Kabr from his revived ghost.