Devils fan here,
just saying that PDB when he had the horses(2012,,) his system really worked with the Devils. Aggressive forecheck, cycling the puck, good possession team. In 12-13 and 13-14 the Devils were like top 5 shots allowed(least) and top 10 for shots on goal. For whatever reason we couldn't bury the puck in the net,,(losing Parise and Kovy back to back years tends to do that, along with very few blue chips/good forwards prospects...)
by the end of last year/this year, it simply wasn't working anymore. Refused to give young guys a chance to really prove themselves, his stubbornness not to change the system despite not having the players to work with,,,
anyway, I think he's somehow a good fit for the Sharks, a more veteran team that somehow ressembles the Devils back in 2012.
I think both the fans/team were happy to see PDB go. It was time to move on, because of the situation the Devils are atm.
just a few exemples of the way the Devils cycled the puck back in 2012,the D pinching in, and the aggressiveness that the Devils were playing
https://www.youtube.com/watch?v=sT8PM9JGdKo
https://www.youtube.com/watch?v=UCqShkKgJuw
https://www.youtube.com/watch?v=aw-aDjryd1o
also a beautiful PP goal by Kovy vs the Rangers back in 2012(oates was in charge of the PP,)
https://www.youtube.com/watch?v=Ieh0qiZ1JNg