Not a fair assessment. If that last drive showed me anything it wasn't that the D choked. It did however show that we should be taking more downfield shots (where the WR can actually make a play on the ball) because of the chance of picking up a PI call.
The D played exceedingly well enough for the Bills to win that game.
Allen is struggling to slow the game down and make reads. On the whole our receivers are terrible. But Allen was a project when we drafted him, nothing has changed. No one can say what he will or will not be yet.