I am going to repeat myself from another thread. I do think TM has his faults, but I think that part of the issue is bringing on Robinson. Frying pan to fire. IMO, TM got marching orders from DW to fix up the defense. They did. But the coaching staff did not integrate the new coverage scheme with breakouts which have always been a problem under TM. TM has always gone with one of the most conservative breakout strategies in the league. It reduces turnovers and is killing their ability to score. Robinson's comments from the second LA game reinforced my opinion that Robinson is a big part of this year's problem. You don't win by shutting down the opposition; you win by scoring one more goal than they do. You can't do that by concentrating on only one side of the puck.
The slower they get out of the zone, the more difficult it is to score as the other team is given time to set up their defense. A coach can increase scoring through PP improvements, stacking a team with Datsyukian danglers for cycle play or speeding transition. TM has bumped PP in the past. The team has improved in the chip and chase game, but . . . DW has never been enamored of Datsyukian types although he did get Havlat. And, DW has never pushed for speed in personnel.
You can swap coaches, but the odds of improvement with re-treads is small. Best to go fishing for coaching in the fresh pond. And with the age of their personnel, it is best to get a coach that is good with youngsters which is another chip on the side of getting a younger coach. Find a DeBoer type. And find AC's that actually improve a team in their area of specialty like Ramsay for offense.