Wat? Orion is a fucking killer song.. one of the best on the album.
For you, that's it. I think Battery, the title track and Damage Inc (and maybe Disposable) are the sole reasons that MoP is highly regarded. For example, I think Blackened from AJFA destroys half of MoP alone and that song was written with Newsted.

Master of Puppets is the greatest metal album of all time in my opinion. Nothing you've said about it makes any fucking sense at all, but whatever.
The greatest? there are so many excellent metal albums to choose one from Metallica as the greatest, but hey, it's your loss.
Wrong on all fucking counts.
Why? care to elaborate?
Of the first 3 full-lengths, Ashes Against the Grain is Agalloch's best. This might be controversial, but I don't care. Yes, it's not really metal in any meaningful way, and sure it's not terribly original. I don't care. It flows beautifully. Pale Folklore and The Mantle just strike me as unfocused and long-winded exercises in pretentious bullshit, but Ashes really hits the spot for me.
I understand that 'long-winded' feeling, especially with The Mantle. As I said, I think only I am the Wooden Doors it's a great song.
Ozzy was important on the early efforts because his singing didn't get in the way of the riffs. He let the riffs breathe which was so damned important, I don't see that working out the same way with Dio or the others. That said, I'm a big fan of their later material as well.
I don't feel that Dio is too distracting either, what happens is that Ozzy vocals are so shitty that you have to focus on the music. With Dio you can pay attention to the vocals AND enjoy the riffing as well. Ozzy had the luck to be on the right time when Iommi wrote those killer songs but I don't consider him a real factor to the Sabbath quality, which comes directly from Tony and Dio just stepped in when the NWOBHM/Priest were at the top, thus influencing in some degree to the songwriting style of the band.
Also, Ozzy solo career only have some good tracks because he had a great guitarist to wrote the stuff. Ozzy alone is complete unable to write a fucking decent song, even if his life is on the line. On the other hand, Dio was involved in the songwriting of all his solo material, which was metal from start to finish and quite consistent IMO.
In addition, someone here likes the pre-Cfh Pantera Material?