double post, but bit more serious now.
Outside of the healing tree (which probably is OP, but if BW continues their nerfing practice they make it unplayable if it get nerfed [rendering the class not being viable for any role in any content] the biggest issue is survivablity.
Yes we have stealth, but without stealth we are close to defenseless as dps. As a melee class this is far less than optimal. Considering PVE you are a liability, since healers need to spend more time one you (and you are not even a major damage dealer) and PVP wise it just means you are pretty useless in group fights, because everybody know that we have like no defense out of stealth (yes we have good CC abilities, but against snipers and smashers they wont give you the edge, or even a reasonable chance).
While lethatiity surely can put out good numbers (if not focused), the range issue makes us way inferior to snipers in the same tree. Here the generation of TA seems the second highest issure besides survivability. That you have to go full melee to get TA (or cast nonsensical heal if you specced it) is a major disadvantage, even though we can heal up. In PVE and PVP the sniper normally will be prefered simply he doesnt take the damage after all, because of his higher range for culls and less problem setting it up. Healing without the abilities higher from the healing
tree means downtime in DPS and doesnt compensate for the range disadvantage.
Concealment it is in the current setup very crit dependend. If you win or lose a 1v1 a lot of times depends on mere crit luck and not skill. We might have a great opener, but we can only use it very rarely and if it doesnt crit it is just like you unnecessarily exposed yourself. Since Hidden Strike is hard to be avoided for other classes i think, Back Stab needs to be buff, especially you can use it more often in PVE and it can be countered with skill in PVP. Some significant increase in crit chance would definitly help the concealment specc in both parts of the game. It is not an AOE and it has positional requirement, making it crit most of the time, wont lead to the feared stun locks to death (which assassins still can pull of btw).
Generally I think we all can agree that the two dps speccs are in deep trouble in both kinds of content (you can still do good in pve if you are an extremely skilled player, and you do ok to great in PuG normal WZs, depending on group composition and quality of opposition), but basically you get weird looks for playing Operative DPS on both sides. I might be a perception issue, but then apparently next to everybody playing the game is diluted).