I view that play as an easy first down. The ref that could see the ball was going to call it a first down. The ref that could only see Allens back and not the ball called it short. The ref that could see the ball then called it short. Who the hell goes with the guy that can't see the ball. On replay you can absolutely piece together the angles and see its a first down. I've watched every media outlet this morning and they all said that was a first down. The ex ref in the booth said it was a first down. If you don't see a first down there then you are just dense. We got screwed there.
That said, I don't even care about that play. I care that Kincaid dropped the pass. His time was called to make a play and he didn't make it. Thats the difference between the Chiefs and the Bills. When it's someone on the Chiefs and their time is called to make a play, they always make it. When someone on the Bills time is called to make a play, they don't.
I would also blame Brady on that play. Calling spread offense in that situation is just inviting the pressure. They should not been in spread. Allen also shifted the protection the wrong way. A lot of things went wrong on that play. At the end, Allen made the play anyways. Kincaid didn't.