Basically we run different variations of the same play, which is why we can go so fast. It sounds like it's three parts: formation, side, and wr reads.
In terms of formation we want to get set fast and exploit mismatches like stacking the primary receiver behind another receiver or motioning a receiver into a better position.
But apparently we pick one side where the receivers will go live and on the other side the receivers are dead allowing them to conserve their energy for when their number is called
Then the wide receiver basically has 3 reads and decides what route to run based on how he's being covered:
-if the cornerback is even with me and I've got outside leverage I'll go deep on a go
-if the cornerback is playing off of me in front, I'll run a stop or comeback route
-if the cornerback is on my outside shoulder I'll run a post pattern.
It's actually not that complicated it's we run it so fast and efficiently that we can beat teams with it. It's actually one of those "so simple it's genius" kinds of things. But quarterback and receiver chemistry is VERY important