I watched some map generations with the "reveal map" cheat enabled, and it seems that from the starting zone, there's one easy exit to a zone with a village, and another exit to a village that's heavily blocked. The opponent has the opposite situation. And this seems to correspond to zones 3 and 6. But on this map layout, both exits are identical.
Furthermore, zones 3 and 6 are drawn differently on this map layout, but I watched a map generation and didn't see any difference. It seems like both are villages.
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Does "random roads" mean setting all the checkboxes in HD+?