I re-watched most of the game last night, the Avs actually played pretty well overall. Tangs looks a bit lost right now, but I think that mostly stems from getting used to playing at game speed again. He will be fine. Stuart played much better than people led on... he is pretty damn effective at standing players up at the blue line and is still a physical force (he needs somebody that can handle to puck paired with him). Holden-EJ is going to be the top pairing going forward, while Hejda or Stuart is going to be paired with Barrie (probably Hejda as they should try to keep Stuart on the right for a bit).
This may not seem like a big issue now, but the Avs really need a 2nd PP unit QB. Tangs is back there in an attempt to fill that void, but it isn't a strength of his. There is nobody there that can direct the play and calm things down. A possible solution is to double shift Barrie there, but it wouldn't surprise me a bit if the Avs target somebody in a trade (probably a left shot) that can QB a PP.