There is currently a bug in the Game since Firelands release regarding Warriors.
When a warrior fears you, then applies his slow and root, there will be no debuff showing you you are slowed or rooted.
As a mage I can also blink out of the root. But since the game doesn’t show you the debuff of being rooted, the mage blinks out but is still rooted, and he can’t move.
Please fix this asap, it’s really annoying.