These days you want a coach rather than a manager. A dof can take away all the faff that Carlo doesn't need on his plate. But when it comes to buying players it should be 100% Carlo's choice. They live and die by their signings so it's got to be him that makes them.
Hello mate btw, long time no see
Im not sure the manager ever did all that to be honest, he picked the players and someone at the club negotiated a deal.
Im yet to be convinced of the value of a middle man in a DOF, certainly one on a multi million contract.