Well i do pvp from vanila, now stuck at 2450+-, 3v3, nvm, i know its crapy same like our stealth, fire/frostfire orb nothing special but what about http://www.wowhead.com/spell=55667 ? Do you know if u are in range when dk "use" it you are out of stealth ? There are many many things from every class - sometimes blizz "fix" it but mostly no change ...
edit: forgot point that 2/3 spec are depend on stealth