I don't agree. Yes they did have complex riffs, but only a few per song, whereas now they seem to have sat in a studio, played a riff, clicked on copy, pasted here and there, clicked on another etc, until they had 5 minutes of chopping and changing tempo.
I also feel some of the lyrics feel forced and rushed. Like they sat down and thought "...hmmm, the public liked the tracks about death. How can we do some lyrics that they'll like...", instead of it sounding more personal it sounds made to measure.
Don't get me wrong, Metallica have always been and will always be my favourite group of all time, but I feel a little let down. Maybe they should have quit while they were ahead and just toured playing the old stuff we love.