Soldato
Aye, we saw how good Button was on the softs catching Webber and Alonso...I think the dropoff at the end would be more than made up for by the extra speed. Plus the fact this isn't a great track for overtaking anyway.
Maybe it's the difference between new and used softs. Used can maybe only last 10 laps max, and so they would have had to be on the hard for too long....?