I might be reading this post incorrectly, are you saying you do not want Dancing Rune Weapon? Dancing Rune Weapon gives you 35% parry chance, so it is a must have defensive spell as well as offensive spell in all blood specs. What is the alternate?
I do think wasting GCD on it as well as having to target something to use is very unsatisfying on the gameplay level. Immersion-wise I also think this isn’t as cool as say DH metamorphosis, or warrior avatar. Why can’t they make it a floating shade of DK like a Wraith Walk looking thing instead of a floating weapon you cant even see well.