So uh... I've been trying the game for a little bit.
Played on portable, as expected there are lots of jaggies and some overall blurriness due to the lower than native resolution, but the game still looks fine technically. Art direction tho it's really cool, only got to see the first scene in the blasted Tokio and it was really cool and atmospheric, good shit. Experienced some frame dips here and there, but nothing too serious nor something that would affect gameplay.
Music seems to be on par with SMT IV, which is saying a lot. The first song you hear when navigating the non-blasted Tokio reminds me of Meguro's music, even if it's not his. And the first battle-theme you hear really slaps. Amazing shit. Also the dub seems fine, might leave the jap voices for a second playthrough.
Gameplay... oh man. I started the game on Hard and died on the first tutorial fight. Nice to see they aren't dumbing things down this time.