When using Alpha terrain with Beta as biome source, structures become way too common. One way to verify this would be to go into spectator mode and look for mob spawners: you will find roughly 3-4 visible immediately, as well as normal survival exploration can land you several woodland mansions, not too mention 2-3 shipwrecks per large body of water.
When using Alpha terrain with Beta as biome source, structures become way too common. One way to verify this would be to go into spectator mode and look for mob spawners: you will find roughly 3-4 visible immediately, as well as normal survival exploration can land you several woodland mansions, not too mention 2-3 shipwrecks per large body of water.