Hello Zach,
Quick update, even if you work around the system by run testing every "extinct" team and then run test also the nation in which the extinct teams appear say "Saint Barthelemy" and it catches the extinct teams as reborn. You can test your rules and they'll pass in the pre game editor but when trying to load a "New career" with the file that passed in the pre game editor it crashes the game as it's loading the data base. In the past versions all you had to do was click the "extinct" even without the testing and the extinct teams would be playable sans testing. I'll include a copy of the file below as a test for you to see.
Many thanks
Saint Barthélemy.fmf