Off topic, but to create an immediately effective KDS root key, just set the effective time ten hours in the past. You can validate propagation by looking for the 4004 event in the KDS event log. This is probably not a good idea in production, but is useful when building/rebuilding a lab.

  Add-KdsRootKey –EffectiveTime ((get-date).addhours(-10))

See https://technet.microsoft.com/en-us/library/jj128430.aspx