This week's POI is generating a lot of discussion in the GW2 community, specifically Colin's points on their goals for tanking and healing and overall grand vision for the combat system.
Here's the video of the livestream, Colin starts discussing the Revenant's healing abilities at 4:30 and how it will lead into the challenging group content for HoT.
At 6:00 he says, "We never said we don't want to have the DPS, the tank and the healer in the game, I think that's a common misconception. We never said we don't want those things, what we said is we don't want people locked into one of those roles forever."