A simple thing that's been missing for a long time now is a way to patch existing secrets in the KV store. Since the secret itself is composed of keys and values it quickly becomes cumbersome to just update one of those. I guess now that versioning is enabled it will be easier to build a tool on top.

    $ vault kv put secret/my-secret my-value=itsasecret
    $ vault kv patch secret/my-secret new-value=othersecret
    ^--- this doesn't exist
    $ vault kv get secret/my-secret

    ====== Data ======
    Key         Value
    ---         -----
    my-value    itsasecret
    new-value   othersecret