I don't think you are wrong, OP.
Let's say Josh Allen plays for the Bills for 10 years, then he ought to easily hold all of the team QB records, at least in terms of passing/rushing/td stats. The league has become so much friendlier toward QBs since the 90s, so if Allen is indeed a franchise QB, then Kelly's numbers will likely be surpassed before that time is through, right? As lofty as "break all of the team's records" sounds, I actually think it's almost a reasonable expectation because you're only really competing with two guys, one from the 70s and one from the 90s. Neither of those should be impossible bars to clear in the new modern NFL.
I can't be the only one Allen reminds of Jim Kelly-- not in running obviously, but in size/arm/swagger, you can almost see the 2018 version of a rookie Jim Kelly in Josh Allen.
What I'd love to see the remainder of the year -- Josh Allen in spread formation, with Shady splitting out wide more frequently and bringing in Chris Ivory more frequently. I think LeSean McCoy doesn't fit as a RB for how the team is this year with the terrible o-line but even for how the team is being built.
I think the Josh Allen Bills will/should be a power run game + vertical passing offense. Ivory has been more consistent this year, imo. But, for the remainder of the time he's here, Shady has good hands and obviously he's very dangerous in space. On the other hand, Shady reminds of Thurman, right? So now you just need a Kent Hull and an Andre Reed, and a James Lofton. I think if Robert Woods had stayed, maybe there's your Reed, but maybe Foster, Zay, and McKenzie develop into something.
What were we talking about? Oh yeah Josh Allen, yeah he looks good