One thing Immolation has always needed is more connection to abstraction in their concept- they have already reached it plenty of times in the music itself.
This is very true in their case. The best death metal albums have always been closely tied to concepts, like classical symphonies are.
Deicide - Legion
Morbid Angel - Blessed Are the Sick
Incantation - Onward to Golgotha
Asphyx - Asphyx
Carnage - Dark Recollections
Infester - To the Depths, In Degradation
and a few others
and some more comedy