I think the spawn rate of these things is absolutely obscene. Try going a decent bit into an ocean and see how fast you become fish food. They're worse than normal creepers, especially since they can go a decent bit of distance onto land as well. You go into a boat, and they'll suddenly turn into torpedoes, and wreck your day. It's just aggravating, and I'm not sure if the spawnrate is normal, since this just seems unnecessary. This is especially annoying when the pack in question, GT:NH, requires a lot of clay and access to water. So you don't exactly get to choose not to be near water at any given point.
Spoiler: My personal Thought Get wrekt? The spawn rates are the same as on the official GT:NH Servers. Clay spawns in other places then in the ocean.... You could try their?
After some investigation this is definitely how the pack intends it. Water is dangerous. This makes exploring extremely hazardous. We won't be changing anything here.