Personally I think the blesses go very well with the spells. Sorcery paths are typically very powerful and have weaker blesses while elemental paths have stronger blesses but fewer powerful spells. I'm not sure if it's meant to be that way or not.
You can't make D9 give fear 0, it's just too strong. I think death and astral blesses are fine the way they are. Air bless on the other hand - I think precision would be interesting for that.
What if B9 gave some form of blood vengeance? Would it be too strong?