Great tie and you seem to all ready know what to improve. Wrap the floss or silk flat for a smother body. Your body would be great for catching fish. I like the wire if it was a little tighter to the body and it will help it sink. I would like the tail just a hair thinner.
My comments are about what I would like, it won't make it a better tie. Look at the body of this Lord Baltimore. I like the body a lot and you can see the thinner tail.
Lord Baltimore from Wolf Creek Fly Tying.