Jimmy Kempski has a great breakdown of a cool formation the Eagles put together last year that worked at least a few times with big results. It’s also a testament to how quickly these innovations can be figured out by the defense.
Assuming you’ve all gone and read his piece (I’ll wait), it’s worth noting that this is the type of play that works really well for the Eagles when they have plenty of space to execute. Defenders have to respect the speed of the Eagles receivers up the field, opening up space in the middle. Unfortunately, that advantage breaks down in the red zone.