It's the statements from friends and family that I don't think should be allowed in a court setting - how beloved someone was, by how many people, should not determine the seriousness of their manslaughter/murder.
I'm a bit torn if I'm honest.
Objectively, I agree that killing someone well loved shouldn't be treated as a bigger crime than killing someone without family and friends. That leaves a really sour taste.
However, having been in court participating in the trial of the man that killed a close friend, I know the sense of catharsis that the victim statements gave her family. On the stand, the questions weren't really about feelings, they were about facts. Reading their statements was the only time they were able to make sure that the bastard heard just how much his behaviour had impacted an entire family.
Maybe the answer is for family statements not to be a factor in sentencing, but allowing their use. It's an interesting one.