I would love to see the power lines look more realistic. Everytime I see them now, I can't help being amazed how ridiculously thick the wires are. If there's a bunch of them close together, you could almost hide a helicopter behind them!
They really should be rendered with a much smaller width, so that at a distance they would blend with and only darken the background. After all, this is what they look like in real life up close: Photo 1, Photo 2.
It would be really nice to see this fixed. As it is right now, the wires are one of the most unrealistic looking features of the scenery.