I think McLarens problem in bahrain beyond appauling pitstops and whatever was wrong with Buttons car (what was it btw?)
was that they set the car up for too low downforce levels before they even arrived. I think If they set the rear wing too low before arriving they get stuck with that the whole weekend and have to make do. Hence them being something like 1st and 3rd in the speedtraps. And given everyone with the correct downforce levels were struggling with tyres they were on a loser from the beggining.
3rd or 4th might have been possible for Hamilton, probably 4th.
I think Red-Bull are back for good now though, they have sealed the diffuser again and got the back stuck into the ground like previous years and it showed by Vettel beating Webber, I think this is where the excitement ends this year.