Dude it's definitely an improvement from your last render..
You know that topaz trick I told you about?
Well believe it or not a lot of people use topaz on renders to clean up edges,
especially when dealing with hair.
Do the same thing I said to do with the tags, just erase most of the paz off the focal,
but don't erase the parts that need cleaning up. Give it a shot and see what you come up with.
Also, when you got little pieces of the background in there between the hair, there are soome tricks you can do to get rid of them.
You can use masks, You can see if the magic eraser tool will just erase the bg,
Background eraser tool..Or even the clone tool..but you gotta get gangster with that shit to do it right