Heavy guitar riffs....Yes, ATS wouldn't be ATS with those, and I'm quite glad they aren't there for that reason. But on the other hand, LP haven't made a song with a heavy riff for a hell lot of time (last one being No More Sorrow). And I miss that. Really.
EDIT: BTW, I don't mean background guitars (No Roads Left, Numb, In The End) but litteraly, heavy riffs (One Step Closer, Qwerty,...)