Jenson made comments that they had a new aero package, but this shouldn't affect the tyre wear rates. After 3 laps his tyres were grained, on what was the easiest car on it's tyres early season and one of the smoothest drivers around.
Aero (more or less) shouldn't have this affect alone, so they must have have done something to their weight distribution, or suspension settings/geometry. They may need to go back to launch spec to identify the issues.