Water physics should probably be changed.

[azRR 1]

For example when trying to mine underwater the physics make it extremely hard. I think it deserves a remake.

[Jimmy-T 9]

I don't really understand what you mean by that. I can mine just fine underwater, visibility on the other hand is a different thing. I'd hope the breathing mask made it easier to see under water. But it doesn't. 

When it does come to physics though, I keep getting air on the bottom when I dig under water. As well as the tool in my hand is not visible when in water.