I often find myself clicking the Parent link, because a highly rated, re-parented comment is responding to something poorly rated, therefore hidden from view.
I would find it very useful to have a preference flag that says, essentially, "display immediate parent of every comment above your threshold".
Even though the immediate parent might be poorly rated, it still provides necessary discussion context for its highly rated response. So, I typically still want to read the parents. As it works today, I often feel I'm reading the answer sheet, without first having read the question.