I've never heard Wolfsbane before, but judging from this vid what was Steve Harris thinking hiring this guy to follow Bruce Dickinson? Just from that one song it's clear that Blaze has a limited range and tendency to sing flat - both of which with Iron Maiden is toxic. If anything, an Iron Maiden singer needs to sing sharp (like many metal singers do).
For the most part, he sounds awful here (and he's again mostly flat which makes a lot of his vocal lines sound tuneless), and I'm not a Blaze hater nor an Iron Maiden lover, but he was obviously forced into an impossible situation. Poor guy.