1) Play citizens crowbar in standard ranked, wait a turn, activate its mana ability to destroy target enchantment, watch all your permanents get destroyed as well as it's intended effect. It's happened on two of two games where I've used citizens crowbar so far.
3)I've lost two standard ranked games as a result of losing all my permanents.
4) Citizens crowbar works as expected before the most recent update
6) no workaround found.