Keyboards.
While MM's drums are definitely better than MP's latest efforts, they're still not anything that makes me go WOW. JLB's vocals are really great production-wise, but again, it's nothing special - it's just better than the previous, mediocre outings of DT. Same goes for JM, it's better but not enough. JP's guitar is always amazing, to a point that I can't get excited about them. I do love it that there's no exaggerating shredding solo in OTBOA, where it'd probably fit the most (as it's an AROP-style single).
The keyboards are just amazing. They're so peaceful, I even love the way his iPad stuff sound this time around. They make me feel like I'm listening to SDOIT disc 2/IAW/SFAM.