The daily practice report expounds on those two topics with Clay Helton's comments, and Helton also reaffirms the plan to rotate in the secondary.
https://usc.rivals.com/news/thursday-notes-rb-quincy-jountti-earns-scholarship-usc-chooses-captains
https://usc.rivals.com/news/thursday-notes-rb-quincy-jountti-earns-scholarship-usc-chooses-captains