I'm going to give Hartley until we get some more skilled size on our top 6 and a legitimate #4D before I rate him. I'm not happy with our team right now but I'm also realistic about our team and there's enough youth on the roster that just changing coaches isn't enough, though I'm sure you could get 3-5 extra wins (which is probably enough to be in a bubble playoff spot) with another coach, that doesn't mean that coach is necessarily building the best habits into the players.
I liken it to Thierren on the Penguins. He built good habits into the players, even if his systems sucked.
They add Bylsma, the systems are fixed and they win a cup. But Bylsma failed to maintain the good habits and the team declined.
Then they add Mike Johnson. Better habits, worse systems.
Then they add Sullivan. Better systems, ??? habits.
IMO Flames teams were kind of like that too.
D Sutter - Habits+System
Playfair - just a Sutter extension, but we saw the habits slipping
Keenan - System, but no habits
B Sutter - by this point the habits were bad and the system was bad
Hartley - he's brought the habits back around
Dougie Hamilton is seeing it too. Under Hartley he has to build good habits, whereas under Julien the system protected him.
Hartley is a good habit-building coach even if his systems are pretty sketchy. We've seen the results bare some indivudal fruit with Backlund, Brodie, Giordano, Ferland. Since the All-star break we've also had Monahan playing probably his best two-way hockey of his NHL career.
A day may come when the you-know-like fails, when we forsake Bob Hartley and break all bonds of headcoach, but it is not this day.