Configuring hive server to proxy the connecting user at the Hadoop level

In my kerberosied environment the only way I can get the hive server to proxy a non Hadoop-level superuser at HDFS level is to use Trusted Delegation as explained here . According to

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Accumulo cell level visibility on Hive

Looking at https://cwiki.apache.org/confluence/display/Hive/ AccumuloIntegration I'm wondering why there's no support for cell level visibility. Any thoughts? Thanks,