I agree you bring in VVD if available. No question. However, with a crowd at CB, why not transition Azpi to play more at wingback as a sub for Moses and/or Alonso? He was serviceable a few times last campaign in that role.
Whatever is decided, we have to shore up the midfield. Kante and Cesc are clearly not working. How about a formation change? Adding a third midfielder seems like it may be the best way to get the most out of Cesc.