At DHL you can specify a preferred location. For us, it is the terrace that is accessible to the courier. It works wonderfully in itself. But I don’t know how it works if a package ever goes missing....
By granting permission to leave the package, the risk transfers to you. However, it is no different with the Packstation. If the compartment is empty, it is difficult to prove that there was never anything inside. But no one can take anything out of the parcel box without a key anymore without vandalism.