I've played a private pack with this mod for the first time and it was quite fun to be in fear of the mobs. We built a thick wall on a peninsula for the first few nights which the mobs nearly broke through. Then someone realized that the mobs have a problem with water and built a cobblestone wall surrounded by water. At this moment this mod became completely useless and we never were in any danger anymore.
I'm not sure what to change. Disabling water duplication helps, but changes other mods balance drastically. And even then it's only a matter of time until you've got enough water anyway.
Breaching creeper never seem to explode because they can't get close enough to the wall to trigger the code perhaps? Not that it matters, they sometimes explode due to other factors but deal no damage due to beeing in water. Same goes for TNT zombies.
Zombies never seem to dig or pillar for the same reason. No cobblestone block was ever damaged or even touched after the addition of the water.
Some mobs came from below, but once enough mobs were stuck in the water the game didn't allow for any spawns below our base.
Then the 8 day came and... nothing happened? I'm not sure what exactly is supposed to happen. Breaching ghasts and the like seem to be disabled by default?! I guess only flying mobs would have been a problem at that point, although encasing the base with water would probably also remove that threat as ghasts don't deal damage through water either?
All in all I was a bit disappointed by my first experience with this mod. The explosions and the digging the first few nights were great. A tiny zombie digged a 1x1 tunnel directly beneath our base and it was "They're in the walls!" kind of scary.Then nothing really happened. Never saw any pillaring, nothing ever attacked over the ocean and adding Special Mobs didn't help either because even if you have mobs that kill you in one hit or teleport you to the moon, if they never can get close to you there's nothing they can do.
I've never encountered this issue. If anything I had the opposite reaction on my (private since we're still working on it) modpack the insync ghast firing squad was deadly as hell. even incased in bedrock I almost died. then at random times the mobs would speed up soooo fast like i did /speed walk 10 or /speed fly 10. First 4 nights I just ran through the forest with a conga line behind me of zombies stopping every so often to rest an eat in a villge then out of no where hole would open up n spew out 20-30 creepers every 2 minutes, followed by a legion of sniping skeletons. I felt sorry for the village as i ran and hid in the trees watching the mobs kill everything in site an each other.