Anyone trying to argue it was defensive PI is delusional, it was definitely defensive holding and there should have been another play from the 13 yard line. If you think Gronkowski could get anywhere near the pass (dear god was it a shitass pass, some have speculated it was intentionally shitty to try to draw a penalty but I think it just happened to be awful) even if it were just him and Brady on the field you are out of your mind.