It is quite sad to see the world map change to a gray version. I like being able to see my empire in the flat map but it would be a lot nicer if they can add map modes that are more terrain based as well. I personally find exploring farther and father quite more dull of an experience due to this, especially if it is just full of land. 

I also would like to see a terrain map mode which shows vibrant natural colors. It is, afterall, what we see from satellite imagery on this green and blue ball floating in space.

A mapmode idea is nice.

People have also called for better visibility on railroads from the zoomed out map (which would be very useful to see what connections exist and what are missing)

I wish battles had a normal terrain mode. I don't like that the whole battlefield turns to grey. Just a clearly visible battle borders would be enough.

Please! This game is beautiful! The gray filter is not