"here are the 5th years I've tracked"

Thanks for the list!  I mainly follow the Northwest Conference but was not aware that Pacific Univ's Briley, Riley, and Sydney had returned for their 5th year.  Pacific U was competitive last year and with their leading trio back for a 5th year could be even better this year.

But in addition to that Big Three, Alexis Intong is also a 5th year player and a useful big, sometimes starting and sometimes coming off the bench:
https://goboxers.com/sports/womens-basketball/roster/alexis-intong/10669

I know a lot less about Kaylee Brooks-Manuel, she was a senior last year and is thus yet another 5th-year  player who is a grad student.  But this seems to be only her third season of actually playing for Pacific U; I don't have a good enough memory to remember her from earlier seasons.
https://goboxers.com/sports/womens-basketball/roster/kaylee-brooke-manuel/10672

Mike Meek has left George Fox Univ to be the coach at the Univ of Portland.

On the one hand, that's a heck of a coach that George Fox is losing.  OTOH, they lost an equally good coach in Scott Rueck (who's finding regular Sweet Sixteen success at Oregon State Univ) and managed to find a good replacement.

And perhaps that points the way to a possible replacement for Meek.  Prior to George Fox, he'd coached at Southridge High School in Beaverton, which has continued to compete for championships in his absence.  Just a couple of weeks ago I saw Southridge play in the Oregon class 6A high school championship game:  their point guard (second-team all-tournament) is McKelle Meek, Mike's daughter.  So maybe Southridge's coach Mike Bergmann could be the next to make the jump. 

Or another high school in the same town:  Beaverton High School lost to Southridge in the semifinals.  Beaverton is coached by another highly successful coach, Mary Naro, who's the daughter of former Portland TrailBlazer coach Rick Adelman.  She had played college basketball and still holds the assist record at ... the Univ of Portland, to close the circle here.  (An observer noted that Oregon is a small basketball community, with the same people or families popping up again and again.)