Hello, I was playing a map in PvE, and an Ogre Bruiser used Shattering Sweep to turn around, even though he had the Clumsy trait applied.
Clumsy doesn't affect any cards which require the character to choose facing in order to attack. See also: http://forums.cardhunter.com/threads/clumsy-doesnt-affect-cones.4683/ It's definitely a bug, but super-low priority.