The Hamilton maneuver was hard on the border, but it was no way a DT. He got a warning for that and thats enough, considering he wasn't actually blocking Petrov, he was trying to get him out of the draft.
Anyway, big Kudos to Hamilton for passing again some cars where others seem to fail. Ferrari had to wait till the moving roadblock Alguersuari went into the pits to get by (this should set Schumachers Melburne performance to a better light). But overtaking seems to be still nearly impossible if you keep in mind that Hamilton got stuck behind Sutil and Massa / Alonso behind Button but were nearly 2 secs faster when they had a free track...
Also there was no single pass in the top 5 drivers... Red Bull being in a league on their own but with the usual safety gap between the cars, Rosberg boring but efficient behind etc. Could have been closer without the McLaren / Ferrari fail yesterday, but I somehow doubt it would have changed much on the result after lap 5...
Btw, Ferrari build quality being italian this season again? I think that were 3 engines being killed.