Didn't change a thing. My entire family liked it and that doesn't happen very often. Only complaint was that there wasn't enough.
I made some changes because of items I did not have, however, I think it turned out very good! I think I might consider throwing some baking powder/soda into the "cobbler" in order to make it more biscuit like.
This is an excellent dish, and it is quite simple! I used turnip instead of parsnip, and rolled the cobbler, as suggested, I also removed the bay leaf before putting the cobbler on. A new favorite dish, that I will make often! Thanks!