It's a lot easier to turnover your coaching staff than it is to rollover an entire roster. At least that seems to be the prevailing logic around the NHL these days.
There were five coaching vacancies at the start of the offseason: the Colorado Avalanche, Dallas Stars, Edmonton Oilers, New York Rangers and Vancouver Canucks were all in the hunt for a new bench boss. The Buffalo Sabres and Tampa Bay Lightning fired and hired a new coach during the regular season, meaning it's been a tough year to be a coach.
Not quite as tough as it was in 2011, when there were nine firings, but still pretty rough.
It seems that a lot of teams took the outcome of a 48-game, lockout-shortened season to heart, deciding to move on and find another man for the job. Coaching isn't a minefield full of the lost and wounded for no reason though.
It's a hard job, and securing the right man for it can be the difference between a lottery pick and a run at the Stanley Cup.