I suppose you are correct and I may be incorrect... I am basing it on the fact that I have never seen a prosecutor offer something other than reduced speed on a speeding ticket, but maybe they could offer a different charge if they wanted to.
What I am probably thinking of is that they cannot offer to change a speeding ticket from charging the DRIVER to charging the VEHICLE OWNER instead.
I am not a lawyer and I am not a paralegal and I do not give legal advice.
All statements made are my opinion only.