I watched a stream last night, (cant remember who's lol) and for their first blood moon night they dug about 15 blocks down and above the ground they had roughly a 1ox10 area with spikes and barbed wire placed. Where they were underground was a little bit off to where they placed their defense..... and they dug straight down and were in their tunnel before the timer hit 23.30. That's fricken quick and somehow they survived, but they totally ignored the path to get into the tunnel in the first place. they just went "ok they are here under ground and dug directly down and nearly dropped on their heads. Pathing has changed, these Streamers (there were 4 of them in one group) were obviously new to the game or they were more into the testing of the new ways the Zombies react, but it looks a ♥♥♥♥ load harder than it has in previous Alpha's.