Obviously we need a lock -- don't REALLY care who, just not Rodda he can stew in his mess for a bit.
I'd prefer us to play the guys we have where we can, so for example I'd prefer us not to take a back rower we have about 12 of those at or about test level, no Kerevi (I REALLY LOVE Samu but Jordie is our 13 going forward and O'Connor & To'omua should cover both center spots.
So looking at the positions we'd clearly not need anyone THP, Backrow, Centers, Wing, we would maybe need someone at Hooker, Lock, flyhalf, and perhaps fullback.
Maybe a flyhalf like a Barnes (fullback too), or Lealiifano. But I think O'Connor is fine for now while we bring through our future options. O'Connor is in good form and I don't see anyone who'd radically change things at flyhalf.
Not sure about Hooker Latu hasn't been playing much so can't be THAT good if he can't get on the field for his French team, and I don't like him because he's an idiot (good player but an idiot). Plus we've got a few hookers there or there about with Fianga, BPA and Uelelsea. I've seen nothing to suggest there is anyone else kicking around who'd serve us dramatically better at hooker.
IMO probably two locks. Maybe if there is a gun LHP I can't think of I'd say we just bring back two locks. Likely Arnold, maybe Skelton. I actually almost would rather see us work with what we've got. Maybe a game breaker like Kerevi but I really don't like the idea of someone else who isn't playing in Australia parachuting in over the top of someone who's been here, who's worked hard for it and who's earned it.