I think part of the issue here is the need for the user to constantly adapt as new functionality is added. Not all features are going to turn out to be useful, so each user now has the added responsibility of customizing the experience using the privacy and feed tools that have also been added. Once people become aware of the tools and adept in using them, it will be less annoying. I personally have set all my SM “volumes” at levels I find useful, so I am not experiencing any SM fatigue.