I agree that we're getting more open receivers on the field than in prior years, it's not magic, we're sending out more route runners, and have what appears to be a much bigger set of route trees worked into the playbook than what we ran as a passing offense before.. so we're simply sending out more people to more spaces on the field on any given play.
What I'd be really curious to know is what the audible system is, or how those play calls are coming in from the sidelines and out of the QB's mouth in the huddle, because it seems to me that the one thing that's really lacking so far in the offense (aside - you know, from actual TD's)...is on a passing down, the ability for the QB and route runners to line up and check into a pass play at scrimmage that can take advantage of whatever the defense is presenting.
In a new system, on a pass play, I suppose you need to know where to line up first, and what the original play call is supposed to be before you can get to that.
AGainst defenses that are going to crowd the line of scrimmage to stop the run, there are going to be open receivers on the field.
On a pass play - the questions are simple. Can you get everybody blocked long enough for the QB to find the open guy?, and then - can the QB get the ball there? - and the receiver catch it?
It's really not a complicated game. BLocking and tackling. There are just hundreds and hundreds of details to take care of, and nearly two dozen players at a time on the field doing it all.