Ailion posted tonight that these changes for Nightblade and Bladedancer are up on the PTS.
Bladedancer: Blade Hustle: Now increases the damage of your next Quick Strike or Precision Strike by 5-15% per stack, up from 3-9% per stack. Now stacks up to 5 times, down from 10 times.
Nightblade: Living Flame: Now also applies Fiery Spike onto affected enemies.