...you may wish to heavily caveat exactly what training you think could be offloaded from an F-35/F-22 onto a training aircraft!
I'll leave that up to USAF and USN to decide. Of course whatever they decide will be decried by the negative nabobs here as foolish, unworkable, short sighted, and various sundry other problems only they can see but USAF and USN can't.
For example, general seat-of-the-pants jet flying experience; g tolerance; 3-1 procedures versus other agencies (CAS with JTACs etc); BFM; ACM; other Air/Maritime and Air/Land integration activity.
You may wish to add datalink operations. That's a big deal in modern high connectivity air operations.