Ok first off, Lethality can do some wicked pressure damage and out heals concealment. It is currently the highest parsing DPS spec in 5.0 so I'm not sure why you think its lacking? If you're just saying that dot spread in general is not playing well in yolo's then I tend to agree, mostly because there are so many Mercs / Mandos nowadays that no one clumps up anymore for ideal dot spread situations.
The point I was making was that in the current meta, scoundrels / ops in general are not doing well... With multiple nets being thrown at you, scdrl / ops become some of the squishiest in the game. Couple that with concealment's lackluster DPS and you have yourself an under performing spec.
FYI: Multiple Nets > "Jesus Roll"
Lastly, I'm not sure where all the hostility comes from regarding the server I play on but feel free to xfer over anytime and show us how leet you are on your conc op.