Lol, he WAS the band! This is definitely one of those instances in which a member leaves and it's best to just dissolve the band. Very short lived yet they found a good amount of sucess, Sumerian must be pissed.
I will never forget when this guy tried to cover Sleeping With Sirens, and claimed that Kellin is a fluke of a singer and can't sing for shit live. Then he went on to make a fully auto-tuned album.