Isn't that just basically a 4-3-3? His formations for Chile were like the too, they were great to watch in the last World Cup. Can imagine the massive headfuck he'd cause for all the thick pundits if he was managing in the premier league. Last season they acted like they'd never seen three at the back before so god knows what he'd do to them.
Think it's hard to judge a keeper who makes lots of saves for a team fighting relegation - people don't tend to dwell on any mistakes they make as much as when it's a keeper that hasn't had much to do.