Is it a good idea? I'm inclined to disagree. Unless there's a real JGPF candidate in one of the older junior ladies, JGPs should go to the junior ladies under or at the age of 26. It's super unlikely that a 17 year old junior is ever going to be a major factor as a senior lady, and the US ladies post-Gracie and Ashley need all the help they can get. That JGP experience is soooo important. Counting alternates, none of the Russian ladies on the JGP were born earlier than 2000 - correct me if I missed one. Two Japanese ladies were born before 2000. 5-6 US ladies were born before 2000. With the limited number of JGP spots, those spots should be going to ladies who have a shot of going to the JGP Final, potentially medaling at JW, and having international impact as a senior.
Obviously that's a tall order, but that seems to be the strategy for Russia and (sort of) Japan. I'd love it if Vivian Le, for example, had two spots. She won bronze at both her JGPs last year and should've gone to Junior Worlds, but instead we sent two 18ish year olds to lose to 14-15 year olds.
It's nice the USFS gives the older girls a shot, but maybe not the best for elite US ladies skating.