I played this recently for the first time. I really liked the idea and the environment, but yes the wild life was annoyingly aggressive. I often used my mini sub to simply ram enemies over and over until they died when they were near things of interest.
I do have one overall design complaint though. The world is quite big and finding tech can become quite tedious, even when using the wiki. I had all these upgrades I could make, but could not find the upgrade station tech to make anything. Even using the wiki searching suggested areas turned up nothing. It wasn’t until I built the sub and used a map and spent a fair amount of time that I found a wreck that had what I needed.
The game really needs a map, which should start out blank. Also there should be some story reasons guide you through the tech tree.
I mean, just random exploring is fun, but it can get frustrating after a while. If you need X, and you have a large world to explore, finding X can become very tedious. Also, silver needs to be more abundant. I had piles and piles of gold, copper, and lead, but silver was always a rare commodity.
I put the game down and I hope it gets finished soon. Id like to try it again when its done. It does have a few bugs and other issues at the moment that need to be addressed.