From http://www.wowhead.com/blog=184160/p...-spell-changes
"Feral Swiftness now causes Dash and Stampeding Roar to have a 50/100% chance to remove all movement impairing effects from affected targets when used."
http://us.battle.net/wow/en/forum/to...9528885?page=1
It's a start and it's better than what we have.