Before I was entirely Concealment. But since I logged in and all of my skill points had been refunded, I decided to try a different build. Not because Concealment is worse now (I have no idea what post 1.2 concealment is like), I just wanted to try something new.
So I went with a half medicine, half concealment build. I went up high enough in the concealment tree to get laceration and it's branched skills, and I got up to surgical probe in the medicine tree.
A very viable PvE build, I must say. Before, when I was strictly a Concealment Op, I was using Dr. Lokin and sometimes Ensign Temple as my main companion. Now I'm running with Kaliyo.
Two things I'm wishing I still had are Acid Blade and the skill that gives HS a knockdown attribute. But, that's mostly because I had gotten so used to that attack chain. I'm still getting used to this build (as well as the new UI layout I've laid out) so I'll see how it goes. So far, so good!