I am generally happy with DT12, but one of my problems with it is the muddy mix. Yesterday, I played around with the EQ and the mix I find best to my tastes is when I cut really sharply at the lower-mid range (around a 6 dB drop at the 250 Hz) and a slight cut at the midrange (around a 3 dB cut at 1 kHz). I did not adjust the bass, the upper mids and the treble. It really sounded very good to my ears, the clarity is greatly improved.
Which only means that JP is really just mixed too loudly. Maybe the loud lower-mid mix could have worked with their earlier heavier albums, but the songs in DT12 is really not fit for lower-mid heavy mix.
I am listening to HD Tracks and am using in-ears, so I don't know if the same EQ fix would work with the mp3s and a different listening equipment.