1 - Increase the resolution of the default client. Most people have 1024x768 screens these days you could go at least that big.
2 - Increase the radius of current light sources to at least double their current range, have the old range deliver bright light and have a falloff for the remaining radius, so you get bright centers and large areas of semi-light
3 - Add a cheap, but large and long lasting stationary light source such as a bonfire, or maybe wooden candle holders
doesn't help hunters and travelers much, but would make a big difference for settlers.