As of right now, none of the new core is tournament legal as these are 2 new "sub-factions" that aren't covered in the tournament rules. The asteroids also don't show up on the tournament squad sheet yet either.
https://www.fantasyflightgames.com/en/news/2015/9/4/man-your-ships/
The gray box in the middle titled "How does the Force Awakens core set fit with the rest of X-wing?" shows Resistance going with the Rebels and First Order going with the Empire. That's probably good enough for a tourny.
I think I agree with you because the squad-building section of the tournament rules say "Rebel" and "Imperial" which now include the new subfactions.
And since North American products are legal upon release, it's not like we have to wait for any green light to use them in tournaments. Right?
Not so sure about that as all the other ships officially belong to one of the 3 factions in the game. An official faq, rule book update or tourny rule update would be required just like when debris fields came out.
