Campo Santo's brilliant adventure Firewatch was plagued by some technical issues at launch, particularly with the PS4 version and they have now released a new patch (1.02) to deal with some of these issues. Notably work has been done to improve the draw distance, loading issues and framerate. Rare crash bugs have also been mended.
Over on the official blog you can read up everything that's been done.
It is also interesting to read that the support will continue and that Campo Santo are working with Unity to improve the experience by upgrading it to a future version of the engine.