What I'm worried most about a Donut map is:
1) Capital distance. I think each player should have room to settle at least once in either direction (so roughly three decent cities per player along the "rim". 11-tile separation is a little tight. We could add some peaks or water channels I suppose to increase the land distance.
2) The difference between starting close to the compass points (ENWS) compared to the diagonals (NE,SE,SW,NW). The diagonals have a much larger distance to the other external edge of the donut. This can be minimized somewhat for most players, however.
1) Capital distance. I think each player should have room to settle at least once in either direction (so roughly three decent cities per player along the "rim". 11-tile separation is a little tight. We could add some peaks or water channels I suppose to increase the land distance.
2) The difference between starting close to the compass points (ENWS) compared to the diagonals (NE,SE,SW,NW). The diagonals have a much larger distance to the other external edge of the donut. This can be minimized somewhat for most players, however.