Yes, all the Dark Servant changes (mobility, altered rechage and end cost to compare to controller pets, and replacement of Fearsome Stare with Petrifying Gaze in its arsenal of powers and fixing of their Darkest Night power) are live. Dark Servant radically changes the way you play. Once you have 2-3 out at all times, you're wonder how you lived without them. Just last night, between my casting Petrfying Gaze and the pet's casts of it, I managed to hold a +1 level AV for a good length of time.