The map problems related to villagers not supplying cities are quite game-breaking actually.
Assuming it will get worse the economy will be crippled quickly for towns with villages affected by it.
For my playthrough that was about 6 villages for Battania alone just stuck with 2-3 of parties of villagers each.
Hardly anything could be bought for trade in cities with affected villages. That's on a fresh e1.3.0 playthrough but is reported to happen as well on old save.