The issue is not losing him as he can barely even keep up in MLS.. the issue is never preparing for it.
The last time Busquets played v Real it was the worst result v them at home since he made his debut as lost 4-0, conceded a ton in Europe and had MATS as arguably best player in league in a lot of the wins.
Busquets v that Real and that defence with Pena etc solves nothing.
MATS out, no DM, no pace in forward line, failing to deal with Reals changed tactics.. those are the issues. Not pining for Busquets who contributes to the problems already there and was abysmal in a worse score line v Real last time he played.