Such a great galaxy huh?...Overall looks pretty good to me Andrew, well done
Just some suggestions (becasue you asked

) while subtle, I can see the decon applied, it imparts a characteristic dottifying of the detail effect and I think the star shrinking/sharpening is all that has happened to the stars

but they don't look too bad. I would brighten the inner regions of the galaxy a little too so the galaxy doesn't look as flat and dull.
Again a really good result though
Mike