I'm assuming we only have a certain amount of money to spend in the summer. Considering we need to reinforce pretty much every position we can survive with a weaker LB position, but God help us if we neglect the midfield again.
Why would it depend on De Sciglio?
RB:
Cuadrado (also winger)
Danilo
De Sciglio (often injured)
LB:
Alex Sandro
Yes he can play on the left too, but not if he's injured. We have a clear need for a leftback.