So I just listened to the Steam Controller segment of the Beastcast. Vinny is right about the controller taking a while to get used to, but it takes a couple of days, not months as he implied. Now that I am fully used to it, I will never go back to a traditional dual analog controller. The steam controller is just superior in every way. I hope Vinny sticks with it.
I never thought I would be super positive on gyro functionality in 2015, but it is a killer feature of the controller. Having it only activate while holding a certain button (left trigger in my case with MGSV) is totally critical to making gyro controls viable.