Just completed my first playthrough, this game is awesome. I played the first DS just a month ago, so it's still fresh in my mind as well. The jump between the two games feels a lot like the Persona 3 -> 4 one i think. At least as far as tone and atmosphere goes. I might prefer DS2 slightly, but i don't think it's that much better to be honest, just different (again like P3 and 4).
There's very few negative things i can say about this game. It has way too many party members, and when you only have 4 different stats, some of them end up completely useless. I basically just rolled with MC(max magic, a bit agility), Fumi/Joe (dances and kills everything), Otome(backup magic user as well as revive/healer), and Keita/Hinako (multi-strike/pierce/ares aid/crit up). I cannot see why anyone would ever use people like Io or Makoto, when you have so many better options. It's not like the game forces you that often to use certain characters either.
The final boss is the worst i have ever seen in a Shin Megami Tensei game. I am specifically talking about that last phase. I had to make a Ganesha and Behemoth for MC and Hinako and have them rush him, and pray that they could kill him before he can do his thing or the other demons could overpower my revivers staying back. Made sure everybody had repel phys, and i still only just made it before he was about to fire the laser. And if you make a small mistake and die, you get to do the first two phases again, which is terribly annoying.
Besides that, i thought the difficulty was mostly just fine. The game was oddly hard in the beginning though i thought, at least i don't remember DS1 being that way.
I have 190 points for survivor awards, which is just exactly enough for what i want. I thought that was quite funny. So i get to carry over skills, remove xp and fusion level limits, a new enemy and mitama fusions.