Since everyone pretty much agrees that Cover is pretty useless currently (but a neat idea when we all first saw it), do to Cover what they did for WHMs and Divine Seal. Divine Veil makes all status removals AoE instead of single target. So why not have a Job Trait that does the same for Cover? Extended Cover could extend the range of cover to anyone on the same side of the mob as the PLD, and lowers the enmity for all of those players.

And please, just extend the duration to a minute for the base!