Spock-Prime will see to it that they get taken care of. Vulcans are an endangered species in the new timeline, and a threat that could destabilize the Federation could turn Vulcans into an extinct species. Logically, Spock-Prime has to do what he can to minimize the external threats that lurk in the distance. If that means telling Starfleet that the way to deal with the Doomsday Machine is this, and the way to deal with Vejur is that, he'll do it. It's only logical. The timeline he's from is gone (or inaccessible to him); his only priority is to ensure the safety of the Vulcan people.
That sounds like a cool hook for TrekLit to hang a series on, once the JJverse is well enough established to spin off a book-only series.
I'm not gonna say any more, for fear of crossing the line into "story ideas" territory, but I can see real potential for some great storytelling.