^So Safranski could actually be Vulcan by ancestry but Rigelian by nationality and culture? Maybe a third- or fourth-generation descendant of Vulcan immigrants? That would be cool. Trek too often assumes that every member of a given species is native to that species' homeworld.
One of the smaller touches I really liked to your book DTI: Forgotten History
was the Tellarite Chab jav Lorg, the Federation Councillor (and later President).... from Mars. The idea that Mars has a longstanding Tellarite community was, I thought, really cool and really interesting.