It's been said all season what with all the 'that guy scored' moments. Hartley's defensive system was abysmal, especially in front of the net, where seemingly every opposing player was allowed to skate into the slot unhindered. Addressing that alone would make whatever goalie the Flames bring in look even better.
Unfortunately, it'll probably take the players some time to exorcise the bad defensive habits but with a proper coach that can actually instill a viable NHL calibre defensive system, this team can take the next step into becoming an actual contender.
The only thing that keeps me from agreeing with that assessment is that the difference between last year and this year defensively was night and day. The "that guy scores" moments were minimal the season before. We really clamped down on odd-man rushes and stuck to the front of the net like glue. This season was completely different. The same coach oversaw both teams.
I really want to stress that I'm not going based on the goals against numbers, I'm just saying that last year, that was one thing that really stuck out to me. We'd get outshot-attempted, sure, but the biggest danger was volume of chances against, not the quality. We'd regularly win games where Corsi was against us, but it didn't really feel like our goaltender needed to play exceptionally well. And of course, this occurred over a period of time that would have evened out "luck."
I think what really is clear is that the players this season were not working for Bob the way they did the year before. Not that they weren't working hard, because I think we have hard-working guys. I just don't think they had anywhere near the level of discipline. If Bob lost the room a little bit, or if the players were starting to tune him out, then I guess at the end of the day he needed to go.