I'd argue they're missing a playmaker a lot more than a goal scorer. In the system they have guys like Hishon and Sgarbossa who are pretty good playmakers, but it's hard to see where they fit on the Avs full time in the future.
On the team they have Mack and Duchene who can make good passes, but aren't really true playmaking types looking to setup teammates all the time. Landy can do this a bit, but again it's not his true style of play.
They're missing a Stastny type, and even O'Reilly can play this style, and they're about to lose him as well. Plus Tanguay isn't too far off from retirement/reduced role.
I think there's a pretty big hole in terms of a high end playmaker that plays the game with patience, and slows it down to use his vision and puck skills to setup guys like Mack, Duchene, and Landy. Not that they need to draft this over a goal scorer like Crouse or something, but it's definitely a bigger missing element IMO.