For the entirety of the Belichick run, the passing offense of the Patriots has heavily relied on a possession, slot receiver who was elite at getting open in the middle of the field, and a #2/3 receiver who was either a technician or elite at gathering the ball in traffic. Troy Brown to Wes Welker to Julian Edelman, David Patten to Deion Branch to Randy Moss to Gronk, with a sprinkling of excellent #3's in Givens, Stallworth, Amendola, probably some I am forgetting - on top of that an elite pass catching back as a quality escape valve - Faulk to Woodhead, Vereen, D Lewis, White , this covered Charlie Weis, Bill O'Brien, and Josh McDaniels - so we aren't talking about just one coordinator, though obviously one QB.
Looking at last year, maybe I can squint and see Branden Bolden once White got hurt, but no replacement for the Edelman role - Jakobi Meyers might be the #2 role, and Kendrick Bourne might be the #2 role, but Agholar got paid a ton to fill a role that the Patriots literally haven't had in the offense since maybe Dante Stallworth 15 years ago (fast guy to throw downfield to if no one else is open) - and then this year, no third down back of consequence, so that Rham serves that role, but because of that when Harris is hurt, Rham has to sit out drives because he can't get cycled out. And the draft capital is spent on Parker and Thornton, neither of whom do the thing in the offense that has been most missing since Edelman got hurt in 2020, which is that guy who finds holes in the defense. Hunter Henry doesn't do that, Jonnu Smith doesn't do that, neither of them wins balls in traffic well enough to overcome their route running (and other than Kelce and Andrews and maybe healthy Kittle, no one in the league at TE is that guy right now) - they've spent crazy capital on offense and yet don't have the essential player(s) to keep drives moving, which is the slot guy and the third down guy.
Bill has been picking the groceries for more than 20 years, always with success in this area - even when we were throwing Austin Collie out there, that team had Edelman, Amendola, Gronk, Vereen - a ton of injuries there, and wasted resources on Dobson to name one, but the philosophy was getting guys who could get open in space and keep chains moving.
I don't actually know with the personnel Bill has assembled here what the passing offense should really look like - it's a mish mash of skill sets that offers little in the way of reliability with route running and finding mismatches These guys don't win 1 on 1 easy, they don't contest balls well, they don't get open all that well - I can't stand that Matt Patricia is the offensive coordinator, but I also don't see players who fit together in any sort of coherent way.
For example people mocked the Christian Kirk signing, but he has helped unlock Lawrence, made Zay Jones a major threat on the outside, and freed Evan Engram to a career year. Having a Tyler Lockett catching 72% of his targets is allowing Geno Smith to make both him and DK look good. Not every offense needs to run the same way, but the good ones tend to have a guy who can win outside and a guy who can win inside and this team has neither. I don't know what playcalls you run passing with this group and feel good that you're scheming a mismatch to make a play. Agholar for all his speed doesn't look to me like he gets open well, and there's tons of corners who run fast - you beat them with speed when you combine that with technique and have teammates who force the defense to play towards the line of scrimmage.
Bill has found those guys for 25 years from the 7th round, undrafted, 4th round, and its hard for me to imagine he's lost that ability, but you could give this offense to Norv Turner in his prime (just to name an OC who was pretty damn well successful) and I'm not seeing where he's scheming mismatches with this group.
The personnel team here has utterly failed - until that is fixed, coaching might mask some stuff, but you're not putting a winning program out there.