I think you have to look at this as a net result situation.
Following a jury trial the charges would be gone and Rush holding a clean record.
Following this deal Rush keeps the not guilty and holds a clean record.
I do hope the FL Bar somehow sanctions the prosecutor for lying about the statement of the ethics department opinions. There is no statute of limitations on bar complaints, no speedy trial. This prosecutor HAS impuned the credibility of the prosecutors and legal system by his misrepresentations to state and public.
Kinda like our Nifong in North Carolina. The prosector in Rush's case was hoping to turn this into some type of Democrat Vehicle "for change". They failed.