It doesn't even look like the merc is trying to kite, if he is he's doing it terribly. The Merc has to stay outside 10m, he doesn't use his cleanse to remove the slows and he uses his knockback before the PT uses his grapple. Still going to be tough to take out an equally geared PT but if you just face tank it, this is what happens.
I agree 100%.
A merc who tries to fight a powertech within melee ranged is going to be roflstomped.