You're all taking this too seriously.
P&P is not under any threat at all. It's hallowed pages remain untainted and preserved.
Just look at Death Comes to Pemberley as a rather pleasant diversion which just happens to use the characters of Austen's creation. Viewed as such, it's really very enjoyable, and certainly the best television over Christmas.
Life isn't about waiting for the storm to pass, it's about learning to dance in the rain.