I'm just saying losing both your coordinators isn't minor and cannot be brushed off as insignificant because they are the Patriots.
What defines "significant," "insignificant," or "minor?"
Here is the historical breakdown of the NE coordinators from 2001 on, including all regular season and post season games. As such, all games are equal and there is no emphasis on the playoffs or whether they won or did not win a championship each season.
OFFENSE
Weis (2001 - 2004): 57-16 (.781), 24 ppg scored
McDaniels Stint 1 (2005 - 2008): 54-18 (.750), 27.3 ppg scored
O'Brien (2009 - 2011): 39-14 (.736), 29.8 ppg scored
McDaniels Stint 2 (2012 - 2017): 86-24 (.782), 29.7 ppg scored
DEFENSE
Crennel (2001 - 2004): 57-16 (.781), 17.3 ppg allowed
Mangini (2005): 11-7 (.611), 20.4 ppg allowed
Pees (2006 - 2009): 53-18 (.746), 17.8 ppg allowed
No Defensive Coordinator (2010 - 2011): 29-7 (.806), 20.4 ppg allowed
Patricia (2012 - 2017): 86-24 (.782), 19.5 ppg allowed
With the exception of the one season with Mangini as DC, all the other coordinators were basically winning at a 12-4 rate or slightly better. IMO, not a huge difference in any of them. Heck, their best stretch percentage wise was then DIDN'T HAVE a defensive coordinator (although they gave up a few more points per game without one).
Yes, they had a 9 year span without winning a SB in the middle, but unless we are going to say that coordinators win or lose playoff games then they coordinators overall have been just as consistent as the team has been.
So while I agree next year the team may look and feel a little different with different coordinators, as long as BB is there I doubt that the outcome will be dramatically different. And with a bunch of guys that went on IR coming back next year, IMO the pats will start the season stronger than they are now (which at a minimum was AFC champ worthy).