The point is you have the ability to counter against cloak. Stealth is probably the most complained about ability in every single MMO that has it. I bet the Shadows and Agents are delighted that the ire of the community is currently turned against sorcerers, or else we'd hear no end to all the moaning about how "OP" an integral part of the rogue class is.
But I digress, you have the option of nullifying cloak. Its unfortunate that you didn't save your CC-breaker, its unfortunate that you spent your ammo on another ability, and its unfortunate that the general situation turned against you. That's the nature of PvP, its unpredictable and you need to stay on your toes. Handicapping your opponent does equalize the playing field, it just delivers the metals to you on a silver platter.