You really think rugby techniques are going to work in the NFL though? I struggle to call this a rugby play simply because in a rugby scrub no one is firing off the snap like they are in the NFL. In Rugby scrum both sides are already interlocked and it's a slower pace.
You go back and look at Kelce during this play and he fires off fast and low. I hate to compliment Eagle players but if anyone deserves it Kelce does. The guy literally makes this play happen along with Hurts and 9 other guys just get credit for being on the field most of the time. I can't express how difficult it is to snap the ball, fire off, keep your helmet that low, and not fumble the snap in doing so.