Regarding the colors, read Oleg's post please. That's one of the primary areas we're working on right now.

In a next-gen sim like BoB, changing colors everywhere is not very easy. It's not just going into a texture and playing with hue - saturation. There's a complex lighting model in the engine that takes the environment and colors it with the sunlight passing through the atmosphere, which in turn is effected by the weather, time of day, altitude, etc. It's a complex system with lots of variables. To give you a rough example, if you just take the grass texture and make it greener, it may look good at noon from 1000 feet on a clear day, but it'll look horrible at dusk from 10,000 in a fog, etc.

So we're still fine-tuning the in-game lighting, but rest assured most of us own a good pair of eyes, and we're well aware of the direction this needs to go.