The team continues to work on updates to SteamVR Input, and we've made strides in the overall system and user experience.
Recently, we've updated the SteamVR beta with an improved Controller Binding UI - making it simpler to rebind games that haven't implemented the new SteamVR Input API. Now it's even easier for players and developers to create and share new bindings for VR games, for any current and future controllers.
In addition, we've created a guide that walks through rebinding three games with different control schemes and needs. You can find this controller rebinding guide here.
We're continuing to work on these features, and appreciate any feedback you may have. Let us know what you think in the SteamVR Forums.