In landscape orientation, the Friends section crowds out the much more important Go button.

I have no interest in the Friends functionality, so the space devoted to the friends notice and the Share button are completely wasted. The Routes and Go buttons could really stand to be bigger, so I can hit them while the phone is in its dock.

Where I drive, I often need to know which direction Waze wants me to go immediately; there's no long driveway or road that I have to travel no matter what.