You forgot the part where the backups - young backups - were bought with the intention of being future starters. Great approach buying young talents slowly integrating them into the squad. Denis is back (great decision to let him leave and develop!), Rafinha was brought back, we can get Adama and Halilovic back if they develop like Denis did. Munir and Samper can come back as they wont be sold without buy back option or maybe even only loaned. Going the "Denis"-route is the right decision. If they develop and prove themselves like Denis did, they'll be back. Only bad decision was letting Grimaldo go without buy back. But Digne looks promising, so it doesn't hurt that much. Unless you got this thing where players have to be Spanish or Catalan. For me, Digne is fine. I don't see the problem.