A number of people have commented in the past about the lack of live clean vocals and I agree it is a bit disappointing to not have them performed.
I definitely think they could incorporate some stronger effects into their live show to compliment the performance. Imagine something along the lines of Dimmu Borgir caliber lights and smoke - would make it a much different performance.
05/26 - Gorod
05/31 - Cannibal Corpse
06/11 - The Faceless