Yes, I would support it. It would be an option at 18, to join either track. Just like it is for adults. 18 year olds have demands of jobs, college, and need a more laid back environment to continue skating.
I also think that there should be an adolescent track, for those who are not at the high level of other teens or who didn't skating when they were 5. Teens don't want to be classed in with children. Teens are very conscious of their bodies, surroundings, and others not thinking they are babies. The current system isn't fair because the kids are developing faster, making hips wider earlier. A beginning teenager has nowhere to compete, but against a skinny 7 year old. Other teens may not be able to continue the hard training needed on the regular track. Maybe, make the tract levels something harder than the adult tract, but easier than the regular tract. This would account for the fact that teenager still learn the sport relatively faster than most adults. Pre-bronze (one foot spins and waltz-toe), bronze (flip, lutz, camels), silver (axel double), and gold (harder doubles). Maybe make it for 13-19 year olds? Doesn't the sport lose alot of kids at 14 years old?