Yeah, if both of them are off I reckon he would be worth a punt. He's a good player who can play all across the forward line. It would be easy to build combinations with him in there. Hard worker too despite the skillfulness which I know Arteta likes.
He's blatantly not on Auba's level though. Talent-wise I reckon he's as good as anyone we have; there's a good chance he'd be starting for Italy right now if it wasn't for the knee injury which slowed him down for years. But asking him to replace Auba is bound to fail. Berardi would do well to get 10-12 league goals his first season in England I reckon, and that's a long way off matching what we've already got. We'd need Martinelli, Eddie and Pepé to step up their game massively to share the burden. Two of those are U21 players.
The big risk with transfers like these is that we end up even further behind because we buy more width instead of more edge.