The survivability is there as 2.0 stands. With Hold the Line and Electro Net (too long cooldown) we've been given our so long desired escapes, no more taking a smash to the face every time a melee-class leaps us.
I think you will be surprised at how rapidly the melee player base adapts to the new Merc abilities and becomes able to negate them. As I said in another thread, on my melee toon, if I get a Force Leap off first on a Merc, he is dead. Doesn't matter if he has TWO Electro Nets. He is dead.