Well, she could pick some other prominent mutant with a voice at the UN. Oh wait, the only other one was Magneto, back when he was leader of Genosha, and he's also a mass-murderer (and no longer has a voice at the UN...).
So I guess Namor's literally her only choice. Or one of the other national leaders who is occasionally mutant-friendly, like T'Challa or Von Doom. (Oh, heads would explode if Von Doom opened up Latveria as a mutant sanctuary state...)
And as long as she doesn't have Sabertooth, Mystique, Magneto, Deadpool, Emma, Banshee, Rogue, Frenzy, etc. on her team, I'd say she's well below the curve for former supervillains.
I mean, really, we're well past the point of being able to field an entire X-team of former villains. There's a friggin' mutant Brood at the school these days, as well as a kid version of just about everyone, including Krakoa and Apocalypse. (And I say this as someone who *liked* Evan 'Genesis!')