Before we get started, and as a general reference: according to a post by @Mirtle (http://mirtle.blogspot.ca/2014/10/2014-15-nhl-teams-by-height-weight-and.html) the Avalanche opened the ’14-’15 season with the ~12th tallest roster in the NHL. This puts them behind Ottawa (tallest NHL roster), and Phoenix (2nd tallest), but ahead of teams St Louis (21st tallest), New York Rangers (29th), and Minnesota (26th).
Now, in many hockey circles there is a lot of emphasis on player height and size – with the advantage given almost exclusively to bigger players. Patrick Roy recently made some comments about wanting the Avalanche to be bigger, and implying that the organization would have drafted someone other than Joey Hishon (5’10") had he been in charge the last couple years, with the idea being that Hishon was too small.