Seduction used to rock the War Cleaver to devastating effect. He'd always turn like crazy during his feints, so despite the short swing distance due to unbalanced, it looked like a real swing.
Another note: As I shielder, I HATE this mechanic, but the bar mace/LHSM/etc can stun even 7.5 weight shields and almost any weapon block on held attacks, allowing you to get a free hit afterwards if the person doesn't realize they are block stunned and tries to attack anyway. There are plenty of skilled unbalanced weapon users who never feint, just use cleverly timed holds.