Contrary to the belief of some, the game needs to be balanced around 1 vs 1. Just because there is a class out there who could possibly help you in a specific situation, doesn't justify the imbalances if that class doesn't happen to be close to you when those specific things happen.

No class should hard counter another class.

Rapid maneuvers is a horrible example of dealing with Dark Talons. First of all, the stamina cost of this ability is astronomical, and utterly impractical in a combat situation, assuming the person uses stamina for damage. Secondly, even if you did use it in combat, it breaks the effect the second you retaliate. So you would submit that this is a valid counter for running for your life, as opposed to having any chance in hell of winning the fight. How is using an ability to run away a valid counter?

The very fact that my first instinct is to run away at full speed when faced with a DK should speak volumes of the ridiculous state of class balance.

Bolt escape. You are flat wrong about this one. Others have already gutted your defense on this broken ability. Total immunity to immobilization, one cc break gives 7 seconds of immunity to everything else to bolt at will. And honestly how hard is it to bolt escape 7 times and find yourself around a rock or a tree just to Dark exchange back to full. In all practicality, not hard at all.