I submitted a paper for a conference. While the paper got submitted for publication in the proceedings, the feedback seemed quite negative. The main criticism was that the model I have designed uses too many simplifications.
I am giving a presentation at the conference in about a week and a half. Since I submitted the original paper I have achieved a significant amount, and have been able to improve my model and deal with a number of the simplifications.
My question is: for the presentation content, do I have to stick with the work that is going to be published, or can I also present some of the more interesting, newer work?
For reference, my field is engineering (renewable energy)