One of the greatest challenges for a Concealment Operative is being able to justify your spot on a Operations/Rated Warzone group. Let's face the reality here, players who can do well with Concealment will do far better with other specs/classes. Our burst AND our sustained damage is far below our DPS compatriots, and it seems so far that Bioware are content with doing nothing to change that.
I would like to propose and idea that should at least help to mitigate the staggering difference between "us" and "them".
Specifically, reverting Backstab to the way it was in 1.1 (Lower damage, 9 Second CD and 0 Energy).
The 9 second CD will significantly help boost sustained damage for Concealment, as we would have a higher uptime on the DoT and armour penetration from Acid Blade.
The change would also help to make the Operative skill rotation less clunky, so that Energy isn't wasted on Overload Shot or using the pea-shooter that is Rifle Shot. Now that's not to say we shouldn't use Rifle Shot, but that we shouldn't be forced into using Overload Shot/Rifle Shot when Energy is at a reasonable level but our tech moves are on cooldown.
If you have any other ideas for helping to close the gap, please do post them and hopefully we can give the devs a thread with several good ideas to tinker with.