This is brilliant to read. Competition is only getting more intense and players like Paterson and McLean will find it increasingly difficult to get in.
Midfield is the most interesting. Take your pick from:
Jack, McGregor, McGinn, Gilmour, Forrest, Christie, Armstrong, Fleck, McLean, Fraser and Gauld (plus McTominay but I'm classing him as a defender).
You'd have to assume Gilmour will be certain pick by the time the next squad is assembled.