The signature itself looks very good, but after you made it darker, there are only few contrasts and the text seems to disappear in the background. Try to add more contrasts.
And in my humble opinion it is way too big.
Yeah, if you get the text more visible again via using the contrast, it might be a hit. Well about the size....it seems to be a bit larger than normal sigs and the big battleship over the border adds some additional visual effect.
Maybe resize it a little, but not too much, I have a feeling that it would look odd then.