I just made one for the sea, been able to hide behind the waves is so untrue and unrealistic you want to cry. The resason i see it as a fix is simple. When you watch a shark go past you can see the water marks as its fin skins the water, you don't see the fin though. And the shark is ment to come up and look as if its just taken a bite out of something floating, because of the sea and the hight of the waves you will not see this in vanilla. You can fine that one here in
Mini Mods. I think this one installs somethings like companions ball choice, which lets you tell any companions which shot type to use. Rum management so it acts like food, so much rum lasts so many day's rather than a few day's like in vanilla. Personally i see things like them as fixes but i don't think the vanilla player's do.
You can also try this.
Bug Fixes base
Also this one.
Bug Fixes coas ships
Work on a unoficial mod is been done, its just been put on hold while i sort out the work i'm doing for CMV3.2.