ULaLa can only play 11 players on defense like everybody else. Sark's offense has a home run built into every play.
The reason why these two thing are related is because it limits the amount of "patient" drives we have (in a good way). Now, as much as I'd like Bijan scoring on every scamper, that shit ain't realistic. Certainly, if he's grabbing 10+ yards, let him roll. Since I don't think ULaLa's defensive coaches are morons, they'll certainly want to adjust. That's when things get fun.
Picture "trips right" - three receivers to the wide, field side of the OL. Customarily, these receivers run at different "levels" in the defense: shallow (cross), medium (curl or hook), and deep (fly or post). It's almost impossible to cover receivers 1 on 1 for any length of time. Unless they've found 4 "shutdown" corners, there's going to have to be some rotation and help.
Our receivers are taught to play routes and concepts instead of positions. You may be lined up inside, but you're still the "deep" route. This prevents the defense from aligning based on formation. They're going to have to play the routes as they develop. As the game moves and the RPO forces more attention to the LOS, the chances are the receivers will encounter misaligned coverage. When the shallow or mid-level guy gets it, that's a nice 8-15 yard gain.
Eventually, the "misalignment" will happen to the deep guy. The NB looked into the backfield to see what Bijan was doing. His receiver got 2 steps on him. Now, the receiver encounters the deep safety. That safety will now ALWAYS be wrong. If he attacks inside to the field, the receiver bends his route to the pylon. If he tries to leverage the sideline to help, the route gets bent inside to the goalposts. Either way, the safety will be outside the shoulder of the receiver. The QB just leads him to daylight. The safety is on tape looking like he blew it big-time, but the reality is that pressure from other options put him in an unwinnable situation.
Sark stresses seeing the deep route first. If it's covered, fine. Move on to other progressions. However, if the defense is properly respecting a non-predictable offense (!), the deep route will open at some point during every series.