My only complaint with TA's sound production is that the cymbals should be higher in the mix. A lot of details were lost. I am guessing maybe it's because the higher frequencies were already competing with each other, with the orchestra and stuff, so they had to compromise.
The kick drum as rumbo said may sound like a typewriter sometimes. It works in many of the songs, not so good in some. Maybe they prioritize being consistent.
For Myung, he sounds a bit low in the mix. BUT when I think of the soundscape they are trying to create, with a musical and orchestra-like atmosphere, the mixing makes sense.
I also think that's the reason why the band as a whole are less playful and show-offish than the usual. They were not going for "prog" soundscape. They were going for "musical".