As in everything Dolphins, I'll agree in general, but have a few tweaks. Coaches can adjust to injuries . . . to an extent. But, because of cap, NO team is deep enough at every position to successfully play next man up. No, not even BB. Excluding that, yeah, a lot of football is being assignment sound. Beyond that, injuries matter.
Agree completely with game plan/adjustments. Every team makes adjustments every game, but game plans should focus on weaknesses of the opponents and finding mismatches. It's been a l-o-o-n-g time since I've sen that consistently in Miami. I hope the O ex-Chan correct that.
Disagree on core players. Shut down just a couple of guys on the opposing O and victory is more likely. The standard game plan of NE. A top O can say 'well, if you take away Hill, we'll move to Kelce,' or take away the pass, we'll run it.' That's part of the game plan the OC/HC develops. (Side note; I'm always amazed teams that play NE seem unprepared when BB takes away their main weapon.) Now some good teams have enough 'core' players, the D can't stop them all, but "consistent production each week from our core focus players (plural)" seems unrealistic.
I agree on identity and variations in O (another staple of NE). Hate to focus on one guy, but the O needs a QB who can take advantage of EVERY mistake by the D. Guys like Brees se a Dman running of the field and call a quick snap. 'Thanks for the 5 yards.' 28-30 other QBs wait, gentlemanly, until the Dman gets off the field. Ahead in 4Q? Milk the clock. Again, I'm surprised how often that's NOT done. Little things. Yeah, the coaches can tell the QB, but shouldn't have to.
As far as Miami, this is a tough call. New OC(s). Better WRs. A year's experience for the OL and an off-season in the weight room. TT in better health and an of-season to learn the nuances. I have no idea if Miami's O will be better or not. SHOULD be, but I've been a Dolphin fan longer than most here and am on first name basis with disappointment. Still, I'm optimistic and am VERY interested in the OCs.