Yes cat form versus warlock drain life + fear works very effectively in arena.
Honestly don't know what you mean about cat form..
Anyway, "bleed kiting", what you are referring to, is only effective versus melee, and mostly in duels/bg's IME. Target switching would be an exception, but you are not really running away.
Against any range, or in arena, the name of the game is closing and staying on target. Partially because that is what generates CC for you, with combo points and swiftness, but also because about every single ranged class will be trying their hardest to kite you themselves or fear you away.
Of course this is generalized, there will be micro situations you want to do other things based on cd's etc..