Joe -
There's always been one thing that I haven't really been a fan of or fully understood when it comes to FBG projections. I am making up a theoretical here, but there have been plenty of times when this type of situation has happened. Let's say a team with similar coaches, coordinators, and the same QB for years have consistently had a team WR2 that put up 75 receptions for 900 yards and 9 TD (to make the math easy). And their actual WR2 from the year before moved on and there is no clear cut WR2 moving forward.
I have often seen FBG projections that take three receivers and give them each roughly 20-200-2 for projections when in reality for several years there has been a guy with 75-900-9. (Basically, 15 receptions, 300 yards, and 3 TD fall out of the mix this way.)
So the projections will have the QB numbers projected too low and the three receivers all valued roughly the same (when one will be worth way more and two guys won't be worth much at all). IMO, I would rather see the QB projected with higher numbers (that have been established already) and a best guess as to which guy will be the new WR2 and projected accordingly.
In what I just outlined, there is very little chance that all the receivers will put up mediocre numbers, so I would rather have FBG project one of them at 75-900-9. If things change over time, I would rather have which player is projected to compile those numbers changed in the projections if it looks like someone else has taken the lead in the WR2 battle than hedging multiple guys in the WR pipeline.
Hopefully you understand what I am saying and can explain why many times the projections are done as I outlined.