i make a point of punching my enemies -- heaps all the time,, obviously the easy ones and that skill gains so I try to get this up fast.
Great pleasure punching out the lesser enemies and comes in handy in the water and when getting your gear back after death.
Also you don't lose you weapons at knee deep , a little further in then lose them yet this is a help as i think if people insist on keeping their weapons when swimming then you should sink and drown until you disarm yourself. ie how i see it lucky for you all this doesn't happen.