This'll be, what, their 3rd or 4th album of songs with Matty, right? Justin was last heard on a ZH album almost 10 years ago now...I say all this because I've really gotten used to Matty singing and it's cool to see the band continue on making some really awesome music. They haven't lost it at all.
MFZB was released in 2003, so yeah, exactly ten years. So I don't even know why people are still talking about Justin. Matty has been their singer for like eight years now and he sang on four and soon five albums. Now that I think about it, more Zebrahead material has been sung by Matty now than by Justin.
I prefer Matty anyway and I think the band has gotten way better since Matty joined. BTTW and Phoenix are their best albums imo.