Are assassination rogues bugged or is my newbie showing?

So playing a rogue for the first time ever assassination spec, Everytime I am stealth and hit someone and come out of stealth my stealth action bat stays up for another 10 seconds and the abilities meant for stealth still work

Is this a big or this by design

Subterfuge

Ok I will need to look into that new to the class

This bar issue sounds strange. As mentioned Subterfuge will give you the possibility to use stealth abilities for another 6 sec. after stealth breaks, not 10 seconds.

But in PvE you don’t talent into Subterfuge as your talents Indiscriminate Carnage, Improved Garrote and Shrouded Suffocation have this “usable 6 sec after stealth breaks” automatically inherent.

Subterfuge is a wasted 2 pointer for Assa PvE.

Before TWW changes Indiscriminate Carnage was at 10 secs but not anymore.

It’s a talent on the bottom right of the spec tree