It's not like variety is a must. For example, THP sounds pretty much the same throughout and it's still a great album. Listened to Heavy again now and I can safely say that I like it. It sure is different and I'm curious to see how this album (cycle) is turning out. One thing I noticed is how smooth the songs ends. Rob's drumming slowly fades out, then the electro beat comes back for a moment and then it ends. I love that