I think you should make the focal point of the tag more visible and the signature less bright, otherwise the sig isn't to bad.
That what i was going to say... the focal point is almost unknown... I would darken the edges then go from there. Its got a lot going on. Nice Job.
I tried darkening with burn a bit, and I tried with a grunge brush and went down the blending list options... none of them tickled my fancy. Any specific darkening techniques you think I should try?