I'm liking Lords of Summer more and more with every listen. It has an attitude and a natural aggression that was sorely missing on DM in my opinion. Even the mid-tempo parts sound cooler than a lot of the stuff on DM. The verses with Lars on double bass sound sick as fuck, and the main riff is actually really fricken cool IMO. I think this has the potential to be a genuinely respectable late-period Metallica album, I won't be expecting anything more than that quality-wise.
What sucks is that the album is probably going to sound like shit no matter who engineers it. Lars and James are too deaf in the high end/sonically incompetent to approve of a mix that actually sounds good.