A lot of people have offered suggestions regarding the game design, story, characters, etc., but I'm not seeing a lot of talk about the atmosphere.
Personally, I wish that HN2 had more of a horrific/eerie atmosphere and mood. I want to feel creeped out by the town, I want to feel uncomfortable in the houses, I want to feel unsafe and vulnerable at night - those kinds of things.
I could go on with examples and how I'd go about doing this, but I think you guys get the point already lol. Maybe I'll elaborate if people ask.