Boudreau has coached stacked teams. He has unquestionably had regular season success with those stacked teams. Good for him. Much more salient, to my mind, is that he has been a playoff mediocrity in TWO different cities DESPITE having stacked teams in both cases.
I notice that when Therrien has success, you attribute it entirely to superstars (Sid, Price) who are succeeding 'despite' MT. When Boudreau has success, that is clearly the result of his awesome coaching rather than the superstars he's been lucky enough to draw. When MT's teams fail, it's MT's fault. When Boudreau's fail, it's 'bad luck' or the players' fault. This is circular reasoning at its finest.
Therrien has been to the Finals, to the Conference Finals twice, and four times to the second round, along with three divisional championships. He also took over a disastrous Habs team and coached it to first place in the Northeast. Considering the talent differential between MT's teams and Boudreau's, I'd call that at least comparable. The simple fact is that Therrien in NO WAY has a pattern of getting far worse results than his team's talent level would lead one to expect. Boudreau does.
Whoever hired Boudreau can keep him. If you put the two c.v.s side by side, the rational GM would pick Therrien.