As Benji says, it was a 4-4-2 diamond really - there were times that Tadic was the furthest forward, but in reality that was because Redmond and Long were trying to shut down their fullbacks.
The new formation seems to have a lot of emphasis on the two 'forwards' doing their fair share of covering/tracking. Just a well Redmond and Long are quick/fit, as they're going to need to be (along with the full backs)! I fear for Austin unfortunately.