Damn that mixing is huge. The drums sound fucking amazing. Better than on the last two DT albums and live releases.
It is sounding really high quality. They said the team that mixed HWtSD would be mixing all the LiveMet and/or MetonTour stuff for this NA tour run, I'm guessing that doesn't mean Greg himself is actually mixing everything but his team of engineers is and I'm sure Greg is overseeing it and signing off on mixes.
The difference in audio quality between these recent releases and previous LiveMet stuff is night and day. So, so much better. Between the audio and video quality, they are almost basically putting out DVD/Blu Ray official release quality stuff for every show, pretty impressive.
For the drums it definitely sounds like they are reinforcing the kit (especially the kick and snare) with samples and blending those with the live sound, the cymbals sound good too, nice and present. The guitars and bass are all AxeFx, so they should be able to get really good direct signals from those. The vocals sound like they have a good mix of compression, EQ, and reverb.