What if Outbound Flight happened, except Thrass didn’t die? Lorana Jizler still lives. Jorus C’boath was just killed by the Sith. And the Far-Outsiders do exist.
Thrawn did get in trouble by the Ascendancy and was “exiled” and we all start with the Thrawn novel that we enjoy reading now. bit.ly/ThrawnStarWars
Here’s a fanfic. This story starts a little bit after Outbound Flight with retcons: http://archiveofourown.org/works/7557187/chapters/17189302