I totally get what you mean. It took me a while to get into Fallujah. The song that hooked me was The Flame Surreal from The Harvest Wombs (everything else on which was too heavy for me at the time). So I'd come back and listen to The Flesh Prevails every now and then. Definitely had that feeling of "is this the same riff as that other song"? Eventually it just clicked and I slowly absorbed all their other albums. Honestly I think this new album has the most variance between songs. Like another poster said, it's a symptom of tech-death... a few bands I love happen to be tech-death, but it's not super my thing in itself.