The ISU deliberately tweaked the rules that way last year in otrder to encourage more men to take a chance and try a quad. So far, it seems to be working.
I believe that the USFSA would send Dornbush to worlds and keep Lysacek home in that scenario. They would retain the right to send Lysacek if they wanted to, but I think that they would not excercise that right in this case. (I could be wrong. I am not the president of the USFSA. This is just my reading of the mindset of the top brass.)So if Lysacek came back next season and was doing well in Gps, but placed lower than the World spots because he did have a bad night, they would say to Olympic Champion stay home, we will send Durnbuss?