I would love to know the person who thinks it's a good thing that the drums are buried in the mix, or that any instrument being buried is a good thing. Look, ADToE is one of my favorite DT albums, but the production is very lacking, and has it's share of problems.
It still sounds miles better than DT12, even with the relatively low drums. While ADTOE isn't perfect it does sound pretty good. DT12 sounds nothing but harsh, and I strongly disagree with a lot of choices on the record. The bass is mixed terribly for instance. While Myung is more audible in some songs than usual, there is pretty much no bass sound at all. The bass basically lacks the bass frequencies from what I can hear, which isn't a good thing in an already harsh sounding album.
Even on the CD version I would probably disagree, but on the HDTracks version, I definitely disagree. DT12 is a pretty good sounding album overall, and aside from TEI, is well mixed too. My main gripe is that snare drum sound, but I've never liked low snares, so that's personal preference.
ADTOE honestly doesn't sound mixed at all to me. It sounds like a rough demo recording, with no production at all. The guitars are boomy and muddy, everything's bone dry, and the drums are flat and weak with no highs, and mixed too low. I'd actually go as far as saying that sonically speaking, I'd easily rank it last among their albums, except for maybe WDADU.