I agree with Moose about the tyres. I see some people are wailing and trying to hang the FIA for it, but it's the same for all the teams. The performance disparity will generally get smaller as teams learn to adapt to set the car up better for the least advantageous tyre.
And let's not forget, Rosberg could not have been passed more at the end if he had been in a NASCAR race - isn't that what you all wanted, 20 overtakes per lap?