Exactly. We're finally becoming a pick-your-poison offense, in other words we're becoming difficult gameplan against and defend.
As for the #1 WR thing, we can debate whether we have one and whether that's important all day, but I think functionally Robert Foster is going to be that guy. The chemistry in that Allen/Foster relationship is what coordinators are going to decide they MUST take away. "We just can't let them bomb away on us." But if you shade a single-high toward Foster, Brown is opened up. If you play two-deep then you have all kinds of issues-- Shady/Gore, Beasley, the TEs and of course Allen can kill you with his legs.
The elite weapons are still missing so it may not be an elite offense, but we may still give D-Coordinators long, anxious work weeks, and with a good D we can win some football games, boys! Go Bills