the sword model is ok, but you really need to work on the hand.
I don't want to patronise you, but go grab a broom, and hold it like it's a sword. You'll see that it's impossible for a human to wrap his thumb around the grip in the same way as the fingers.It looks bizzare.
So yeah, get the thumb sorted.
Other than that, your UV mapping seems to be going VERY nicely. you have no stretching on there. It's a good job.
Don't be disheartened by what people are saying. If you put a thumb on the hand, and make the hand a bit smaller, you'll actually have made one of the best hand+sword models available.
butters