I really think the hate for DSJ is overblown. Yes, the art is downgrade from Kaneko, and is a really bizarre decision to change it for everyone. If they had the new character alongside the old artwork, I don't think it would clash that badly.
However, the art doesn't look that bad, the characters are still very adult, including the new one. People saying she is a teenager really need to go look at the rest of the series again. Nanashi, Asahi, Toki, and 90% of the casts from P3, P4, and P5 are teenagers. Alex from DSJ is (appearing like, because she is definitely a demon of some type) an adult. I seriously doubt her story would be "showing her what love is" or whatever while you build you social link with Zelenin. Alex looks to be about the same age as Zelenin. I think the story will be fine, and still be oppressive like the original, but it will be diminished somewhat due to the art changes. Then again, I think a some of the things people made big deals about being "anime" in IV and Apocalypse were also really overblown. The thing about Isabeau and the manga made prefect sense because of the clash of cultures, and the themes of people in Mikado being introduced to literature they had never seen before. The manga would technically be considered a "relic" and part of the game was about the people of Mikado learning about Tokyo.
Simply put: I think many of you are judging DSJ when we know so little about it. My main concerns for the game are not as much with the story, but with the difficulty. I hope the save anywhere is more like a modern Fire Emblem "casual" mode than being imposed on everyone. If it is something you have to choose at the start and can't change, I am fine with it. A friend and I disagree on modern Fire Emblem casual mode all the time, but I think it is a thing that makes what can be a super intimidating game to the point where they don't want to play more games in the series, something they can give a try, get a better grip on it, and take off the training wheels for future games or a replay.
Strange Journey is well known as one of the more difficult Megaten games, and I think they want to reach a wider audience with the difficulty with this one, I just hope they keep the original audience in mind and make they optional. The art change, I don't really get though, as using the same art worked fine for Devil Survivor Overclocked and Record Breaker (granted always never cared for the way the humans in the Devil Survivor games are drawn).