How a mixed remnant fleet could hobble German naval recovery

Which High Seas Fleet ships should be returned to Germany if the aim were to obstruct its future navy?

A mismatched set of maintenance-heavy battlecruisers or pre-dreadnoughts that prevents useful standardisation.

The most obstructive option was a set of unlike battlecruisers, or even pre-dreadnoughts, rather than a coherent class. Each ship would demand its own maintenance and support arrangements. The recipient could not standardise around common machinery or weapons, while technically troublesome hulls would absorb money and dockyard effort. A heterogeneous fleet can impose more burden than useful combat power.