I really think Death Magnetic is easily the best overall album they've recorded since '91, though there's been some great tracks since then... but I have to agree on some of the questionable nature of the production. Rubin, as it seems he does often, crushed the hell out of stuff, and the drums particularly sound kinda wonky to me, particularly when Lars decides it's time to randomly switch to double-time kickkickkickkick crap. Thankfully technology is way better than it was even a few short years ago, but the overall insane over-compression is painfully evident, and not even used to great effect in my mind. I've heard plenty of extremely squashed albums that have a much better overall sound/feel to them than this, and just listen to how much the drums take over the mix as soon as double kick starts up... yuck. Funny to see/hear that the 'PONG' snare drum wasn't totally a production issue from St Anger, since it's definitely there in this disc too.... apparently that's the snare that Lars likes these days.
The guitar tone is pretty decent, but overall I think it's their worst recorded tone result ever, other than St. Anger. Lots of high and high-mids that make it sound... well, if I'm feeling generous I'd say it sounds modern, but if I'm not, I'd say it sounds buzzy or fizzy.
If nothing else, I really dig the album and I think it proves that Metallica could probably write, orchestrate, produce, and record Beethoven's 9th and a large percentage of the 'fans' would say it was a pretentious piece of crap ;P
I'm also confused by my opinion of Jaymezaah... he's probably 10x the singer he used to be, but at times he just doesn't quite sound 'right' Whereas fifteen years ago, he wasn't that 'great' but he always seemed to, for lack of a better term, 'fit.'
Anyway, if the MkIIC+ was a significant part of the recording, I love to see that this gem can be thrown through a modern recording process, Rick Rubin production, and sound as brutal/modern/rockin' as any other amp currently out there. A great testament to Mesa's engineering, or possibly a great blow to the weakness of amp technology over the past 20 years... you make the call. I must say, it would've been really nice to have had a major guitar-tone breakthrough in my lifetime that didn't consist of trying to digitally recreate old tones ;P
But, as I've said, it's Metallica, and it's Rick Rubin, two entities where, even when they 'miss' seem to put together mostly solid pieces of music, and I'm quite happy to see this album out. I think had this album been released back when Load was, we'd all be saying "Well, this is a pretty good Metallica album," as opposed to the way we're comparing it to a weird, 15 year tangent they've gone on heh.