I don't think native support is a good path to go down. This controller should be able to play everything or most stuff on Steam, not just new games. Steam's best feature is it's vast game library, and relying on new and updated games with active devs to make the game have native support goes against that. Crowdsourcing all the games is probably the best solution and I hope it catches on and that sensible configs rise to the top. The amount of ones using the right pad as analog emulation has been disheartening though.
The existence of native support doesn't prevent universal support. There are indeed games with native steam controller support, just like you can use legacy mode for the older, non-compatible games. This is how the controller already operates.
So if I go to a game page of a game like say Cold Fear and check the controller configuration, there are already some binds made in there. However the game has no recommended configs or community configs uploaded. So someone on Valve's side or the testers made that initial configuration that shows up when I went to configurate controller? If so why isn't that labelled/uploaded as a recommended config and why are none of the buttons labeled to what they do?
Some people have played the game and set up configurations, which is why there are community configs. However, the people with the ability to actually set default/recommended configs haven't actually sat down and made sure they work with no problems in-game. Until someone (specific, not just anybody) can verify that, yes, user-made control scheme A works without problem, then the game won't have a default set.
When you see the controller defaulting or recommending a controller scheme, it is because someone at valve has verified it works.