Greer needs to earn his chance, not be given it. The Avs have too many players who can play LW at a higher level than Greer right now. Greer needs to start beating some out like Wilson, Calvert, Bourque, Nieto, etc. If he can't beat them out, then he shouldn't be in the NHL. I think he can and will eventually, but he hasn't shown enough to be given anything IMO.
I know it is a slower path, but I'd really like to see Greer be a consistent driver of offense in the AHL before giving up on that part of his game. If it doesn't come this season, sure, mold him into a pure bottom 6 grinder. But at least try to develop that offense before pigeon hole-ing him.