About doing fewer than 7 jumping elements and backloading, it is not prohibited, but it is not profitable, so people don't do it. It was not uncommon for top-level singles skaters under 6.0 to do fewer jumping passes than the allowed maximum in the FS. As long as a man's program contained 1-2 quads and a 3A or a couple of 3As and a 3-3 combination, and the rest were triples, nobody cared if the person didn't do a 2A or a 3-2 combination to fill in the remaining slots. With women it also happened, I am pretty sure Tara Lipinsky won the OG with 6 jumping passes, two of which were 3-3, and Karo had 5 jumping passes in her Itzhak Perlman FS, I believe in 2003. Under 6.0, it might have been wise for someone like Gumennik to do 5 quads and a 3A-3T combo, and use the remaining time and manpower to incorporate more choreo and showcase SS. Under IJS, he'd get lower TES and probably not enough increase or even reduction in PCS.