I think all the New X-Men are just gonna be stuck with their mutant names. Blindfold was the closest to having a good legacy name through ‘Destiny’ but she’s presumably coming back, so that’s probably off the table. And mayyyybe X-23 and the ‘Talon’ name but no one currently writing Laura seems to remember that. I wish Hellion got another codename, though.
I know you don’t like any of this cast, but Dust has always defended herself by any means necessary. Even way back when the Purifiers invaded the school: