Conference presenting: stick to initial paper submission or include recent improvements? 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)
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?


Absolutely present the improved model. 

Conference submissions photograph the state of the work at the time of the submission. But from the submission deadline to the conference, many months can pass and usually people continue to work on their projects. Frequently, by the time of the conference, new results have been obtained, and these surely deserve to be presented.