If that play isn't a viable strategy anymore week in and week out it's going to be a massive hit to their offense, primarily because their QB can't throw the ball straight and is as much a rotational RB as he is a QB.
Their offense is pretty clearly designed for throwing short of the sticks and then cheating their way to that last yard or two over and over again to sustain drives.
And fucking spare me that they don't know they are cheating. They are daring the refs to call them for lining up over the ball and for moving early, both of which are explicitly illegal, and also pushing their QB forward in the pile which isn't explicitly illegal but should be, as it's taking unfair advantage of the forward momentum rule where the ball carrier's forward momentum is essentially stopped but for the push from the rear by non ball carriers.
It's not just that "everyone could do this, the Eagles are just more skilled at doing it." The Eagles are gaming the system and the refs swallow their whistles in the face of obvious cheating. Yes, I'm sure the Eagles are probably "more skilled," at cheating like this.
I do not doubt for one second they have been coached and instructed by coaches and team leaders like Kelce to cheat as much as the refs will let them get away with, they have probably practiced jumping the whistle early in fact, they've probably practiced subtly lining up offsides to get an illegal edge too.
You know full well that if the Cowboys were lining up offsides it would be called every goddamn time.