I made a quick test with the sun brightness fix and it seems that you got it just right! It really looks good, I just witnessed some amazing graphics, it seems the world looks different everytime you check what's going on. I really like how the color of sea changes, you did it man!
One thing that bothers me now is that the night graphics can't compare with the daytime graphics. I guess it's hard coded, but the stars bug me. When there is fog, the stars still shine brighty. Night-time storm atmosphere suffers because of this. Well, it's not a this mods problem, it's a problem with the games engine.
I had a small problem with the rain sounds (I like all the other additional enviromental sounds!). Somehow it sounded too local, too detailed if you know what I mean. And I couldn't hear the rain if I used free camera and went away from the boat. I need to test this more, could be my own mess.
By the way, I remember reading that somebody (maybe Sober?) made a fix to the skipping wave animations. Could it be included in this mod? Or do I remember wrong?
Keep it up, this is great!