I'm thinking there's a whole scene cut out that includes that and the final fate of Natalie. She just kind of disappears. Correct me if I'm wrong, but she crawls back to David, he's sad and her body is just gone.
In the original, when Cheryl is at her worst in the basement, a possessed Linda is giggling like crazy and essentially taunting Ash. After a little action, he brings Linda down, takes her to the shed to dismember he with the chainsaw before ultimately deciding to bury her. Not to mention there are images from the movie online of David using the chainsaw and getting covered in blood. Those aspects make me think something significant was cut.
I imagine something like David is lying there with her, Eric speaks up and says they have to finish it and cut her body up, so David takes her out to the shed and cuts her apart with the chainsaw (like we wanted Ash to do in the original) and buries her (pieces) like they did with Shelly in the original.
Also, they mentioned three ways to kill the deadites: bodily dismemberment, live burial or purification by fire. We saw the live burial (scene at the end with Mia) and purification by fire (the opening sequence as well as the final burning of the cabin). We didn't see a final deadite slaying by bodily dismemberment. ... Just a thought.