Look this is pretty simple.
Smugglers/ops seem to be OP because we have the ability to only pick fights against those we know we can win against. period. We go after you when you are undergeared, half health or we just watched you blow your cooldowns in another fight.
Is our burst damage insane in any of the scenarios above.. yup. do we have ANYTHING else besides that. Nope. Our stealth rarely works in a group setting because most people can instantly pop us out once we vanish. We have no speed, no sustained damage, no decent ranged damage, no gap closer. We have 5 second of burst, a vanish and after that we are left with everything on cooldown and no way to do any damage.
I'll concede that even though we are dead in a second out of stealth, if we do catch you in that perfect scenario you are dead just about every time. BUT.. if you are going to take some of that burst away you HAVE TO GIVE US SOMETHING ELSE. You need to increase our sustained damage and give us some sort of gap closer. This is the 3rd major nerf for us and we are already worthless in pve, this new nerf will make us useless in the entire game.