What's the point of having 5 different "skill" levels where triple jumps are allowed?
What's the difference between a juvenile and a novice? If you want to make these levels age-based, rather than skill-based, do that instead of having everyone perform the same skills from juvenile to senior.
Partly age -- juvenile and intermediate have age limits, although the potential elite competitors will generally be among the younger entrants at each level
Partly requirements -- According to the new proposal, Juvenile will allow only one attempt at one triple. So it will be a place for young skaters who are just starting to add triples to their repertoire to try them out without having to compete against novices and now intermediates who are including multiple triples.
Juvenile competitions don't have short programs.
The minimum SP requirements for each level are also different. Which affect the less competitive skaters more than the top skaters at each level, although in some cases it can make a difference.
E.g., juniors are required to attempt double axels in their short programs (and also have a required solo jump and required spin). Therefore a young elite-track skater who has one or two program-ready triples but still struggles with the double axel would be better off staying in intermediate or novice where s/he could include the triple(s) but stick with a good single axel until s/he masters the double.
Seniors are also required to attempt two triples in the SP. Novices are required to include at least a double-double combination whereas intermediates are allowed to do double-single (or triple-single).
The freeskate program lengths are different -- Intermediates get one more jumping pass than juveniles. Novices get a third spin.
The quality expectations/what it takes to succeed at each level increase as the level increases. A juvenile who is earning PCS in the 5.0 range would be exceptional among her peers. A senior with those scores would be hard-pressed to qualify for Nationals.
That said, it seems that the ISU(?) is pushing to equalize the rules for junior and (advanced) novice, which are distinguished by age internationally, and USFS is proposing to follow suit and to qualify the top novices at Sectionals to compete as juniors at Nationals, assuming the proposals to remove novice and lower competitions from Nationals goes through.