Blizzard have a new/reworked talent to show off, as Shadow Mist will be replaced by Danse Macabre in an upcoming build.
Your feedback, here and elsewhere, has not fallen on deaf ears. In hindsight, stopping by the forums sooner to say as much would probably have helped, and I hope you are willing to accept a peace offering (in the form of a previewed upcoming change to the talent that was previously Shadow Mist):
Iteration and implementation for Rogue talents continues in earnest. A handful of iterative changes and significantly more functional talents will be hitting the PTR and Beta across the next couple builds, many of which are related to topics previously discussed here, and we will be back tomorrow to chat with you about more of what’s coming.