Lydia Bennet elopement
This flies against some people who wanted less Jane Austin and more action, but there are some scenes I really miss.
In particular, Lydia Bennet. In the Jane Austin she elopes but is too fluff headed to realise how improper she has acted by victorian standards.
The original Jane Austin scene of her returning and bragging over her status would have played very well as a zombie totally failing to perceive how this dented her social standing.
There were definite classist references with the undead being the lower class. In england they took more power fairly peacefully, compared to the French revolution which was very like a zombie apocalypse from an aristocrats point of view.
Mr Darcy's tolerance of a zombie family member because of his admiration for Elisabeth would have played very well with the theme of him overcoming his prejudice.