JudasMyGuide
The incorrigible papist
There are a bunch of songs where Blaze sings amazing.
Indeed. Singing is not just the highs and the vibratos.
As for the ability to impersonate someone who feels lost, broken, afraid of Fate and its repercussions, insecure, worn, Blaze does a better job at that than Bruce would have. Bruce is the best at other stuff.
He helps some of the stuff to become really haunting. Emotional. Almost singer-songwritery.
Also, his voice is definitely unique and while it may be an acquired taste, I find it very addictive.
NP:

(actually probably my favourite Big 4 album)