If you have watched the Hawks the last 10 years, and understand the X's and O's of the game, there are several things that stick out...and are quite obviously not working. We can start with the defensive zone.... as it is the most obvious, and one of the biggest issues this team has.
The Hawks have never been a strong team in their defensive zone, even in their dominant runs. That's because they employ a passive zone system. They also do not actively take the body, but instead prefer "active sticks". This is what leads to extended shifts in the defensive zone, where they cannot gain possession or clear the puck... They do not clear the front of their net either. Nor do they attempt to block shots... unless it's a wrist shot, of course. This system actually completely works against itself...because most teams that employ a zone defensive system....collapse to the middle, clear the front of the net, and block a ton of shots...(BJs, Sharks, Stars, Wild, Blues, Kings). The Hawks are constantly leaving guys open in the slot, for fear of screening their goalie...apparently.