My impressions after 3 hours.
Let's begin with what I don't like. At the moment the story/atmosphere is unsettling. I don't like it so far but it's too early I guess.
The missions/quests of Strange Journey are back. Oh god, why Atlus? Why? This is an abomination that must be eradicated.
I hate the tutorials and the game is tutorial heavy so far, it holds your hands too much IMO.
These happen to be the same complains I had with Strange Journey as well but seeing how it ended up being an amazing game, I will pass until I get further into the game. But still, this is lame.
The best thing I saw so far is the UI. It's fantastic: slick and very clear. It's so perfect and best part is that Atlus finally put back the possibility to advance the text with the D-pad.
Regarding the demons, it seems they have been buffed. I already saw some lv2 demons with more than 100 HP. It's also a big melting pot already, with new ones who are not bad so far. The roster is promising, I already encountered more than 15 different demons in the first dungeon alone.
Combats are super fast, which is very nice and the press turn is back. With that said the battles are not random any more and I don't like it. You can be attacked while you don't move. The game seems to be well balanced so far but it's not really difficult. I didn't die at all. I don't understand why I can't select hard difficulty from the beginning, which is a shame. I hope the game gets harder later on
The game is very permissive, no more game over when the MC dies, WTF? I guess I've died once if it wasn't the case.
Regarding skills and fusions, I prefer not giving my impressions because it's still too early but I find it became a big mess. No more restriction whatsoever, you can choose whatever you want. However I like how the MC learns skills through demons. It's a very good idea.
Seeing the amount of points I'm getting when I level up and how the MC can use magic, I'm going for jack of all trades by increasing every stat.
I love the music so far, the battle theme and the various compositions and old themes are spectacular.
Anyway, there are many things I don't really like but I was expecting that.
The game is nevertheless very promising.