I'd like to see the ability to disable these. It is confusing to non-advanced users (my spouse). I created one vault for each family member, with other family members having permission to view (and unfortunately write) each other's vaults. The personal and shared vaults confuse this workflow as my wife doesn't know whether her passwords are stored in Personal, her vault (her name), or Shared. I don't want her using the Personal vault as then I wouldn't have access to the stuff she puts there.
I may be an edge case in the way I want to use this though.