Welcome to the boards.
I think the Panarin ship has sailed.
Columbus now would have NO good reason to trade him back to the Hawks.
As for Shaw (I am assuming you are talking about Andrew Shaw), he would be nice to have back if you are a Hawks fan, but for the almost $4M cap hit he presents, I am not so sure he brings enough to help fix the Hawks.....especially when they are so near the cap limit already.
Honestly, I think the top 4 forwards of Kane, Toews, Saad,