largedarryl
Prince
Only within the last 100 years or so have we been able to fully explore the polar regions. Given the scope of CIV this means a mere fraction of the time you are playing would be reflected in real life. Perhaps in mods it could be useful, but perhaps given the communities ingenuity we will be able to mod this feature into the game. Another aspect about a polar world though is that it would take less tile movements to move around the world in a straight lines (diagonally) than any other method. I guess that's one bit that would be best represented by a spherical map.
This is relevant if you are playing a simulation that uses the same climate as present day earth. Now I don't know if you do the same thing I do, but I rarely play full games where I use a climate similar to Earth's. So is it an unrealistic expectations to have non-traversable poles if Earth had a different climate or land mass distribution. My point is really that no-one plays exclusively on Earth maps, so any other games may have strategical advantages based on the poles.
Also with flight/rockets/etc., poles and real distances are even more important strategically.