I just started playing in Midnight Hollow and I feel like the world needs a lot of improvement/additions. Has anyone greatly improved the world? Setting aside the issue that the lighting is way too dark what is the biggest issue for you?

This thread have lots of ideas, especially the last few pages. http://linna.modthesims.info/showthread.php?t=511967

Hope that helps.

Apart from adding some Sims, more lots and fixing the existing ones to improve routing I didn't find any further need to improve it. It's actually one of the few worlds where I am completely satisfied with how it turned out. The only substantial change I made to existing stuff is to remove all that Savvy Seller crap and replace it with the un-savvied items by omegastar.

Yeah, pretty much all that ↑. I love the creepy dark feeling >:D

I feel like it is missing a lot of services.

Such as?

I hate that it's so dark, makes my eyes go mad and makes me irritated.