I played around with the Revenant at lunch for a bit. Pretty fun class. Seemed like a Guardian on steroids. The bigger news though, there a significant increase in the condition cap on the bosses. The condition cap (for some conditions) is at least 100, if not more, an explanation mark shows up when hitting over 100. Here's a couple of pics from Reddit showing an example of this...
http://i.imgur.com/0XIBoIQ.jpg
http://i.imgur.com/YTadzao.jpg
Looks like I'll be going for that Sinister gear for my engineer after all.