I have noticed that CC used from stealth (Sleep Dart/Mind Trap) do not bring up a countdown debuff indicator on the selected target, this is just a simple suggestion to add said mechanic to the game as it would greatly help in large group pulls by determining the time left til the CC'd target breaks giving you fair warning to possibly chain CC. I don's see any reason why just because used from stealth, these abilities do not create debuffs with countdown timers like any other CC.