I don't have any problem right now with the size of the icons, but screen estate is always an issue. Window organisation, as it has been for the last 15 years, seems like it has much better room for optimisation.
Other choice have also seemed a bit arbitrary - like moving the power options to the status bar, whilst also moving the window controls away from the status bar. Mouse movement has increased in my experience.
And by doing that -- the win7 icons don't bother me in the slightest.
Glad to see the downvote-disagree is becoming ever more prevalent! Obviously an opinion on the aesthetics is totally unproductive. Here we go again... k--;