Arizona has been crap for 5+ years now. They don't move prospects with as much haste. Ottawa is a slower cook team despite being on the poorer end. Every team handles it a bit differently to an extent.
Since the 2009 draft the Avs have had 5 picks in the top 5 of the draft and 7 in the top 10.
The Coyotes have only had 2 picks in the top 5 and 4 in the top 10 during that time. The Sens have 1 pick in the top 5, and only 3 in the top 10 during that time.
These teams don't handle their prospects any differently than the Avs. They just haven't drafted as many prospects as good as Duchene, MacKinnon, Landy, and Mikko.
Jacok Chychrun - Made NHL right away in draft +1 year
Mikkel Boedker - Made NHL right away in draft +1 year
Kyle Turris - 3 NHL games at end of draft +1 year. Made NHL full time in draft +2
Clayton Keller - 3 NHL games in draft +1 year after NCAA season ended. Full time in draft +2.
OEL - Made NHL in draft +2 year
Peter Mueller - Made NHL in draft +2 year
Dylan Strome - 7 NHL games in draft +2 season. Then split time between AHL and NHL.
Max Domi - Made NHL in draft +3 year
Brandon Gormley - Given a 3 game AHL tryout at the end of his draft +1 season
Brady Tkachuk - Made NHL right away in draft +1 year
Mika Zibanejad - 9 game tryout at end of draft +1 year. Split time between AHL and NHL in draft +2.
Curtis Lazar - Made NHL in draft + 2 year