He definitely needs upgrades from what they had this yr.
We had no TE play after Higbee had his elbow issue as Everett remained an enigma.
No deep threat hurt as we all know since the offense became more horizontal than vertical, and of course the interior line collapsing on every 3rd & long didn't help.
BTW, look no farther than Brady. Look at how many pundits claimed Brady was washed up last yr because he no longer could push the ball down the field. "Experts" claimed his arm was dead.
So Stafford will need upgrades in these areas even if he is a generational talent. Obviously Brady needed upgrades to bounce back...and he did.
Supporting cast matters.
The lack of TE and RB production in the pass game was a result of the increase in pocket pressure where McVay went to max protect FAR more often than he did in 2017-18. With Goff being such an immobile QB compared to the rest of the NFL... he needs an offense more akin to what Brady runs. As well, I think that McVay underestimated how much coaching Goff needed still and I REALLY like that the Lions are bringing in Mark Brunell to coach him up.
Honestly, the one thing I'm most critical of McVay with has to do with his lack of fully utilizing the 2 TEs that he has. There are teams that we could have just punished because the TE deep seam was there all freaking day and it was just so badly underutilized.
That said, I think a number of things will change in the O with Stafford who is more mobile (like Rodgers obviously, not Lamar). One aspect I'm really looking forward to is a return of the RB dump off in the flat as well as much more of the deep in/seam pass to the TE.