My company is http://www.MojoPages.com and we are constantly iterating the site to improve the user experience. Analytics companies like Kiss Metrics don't show the level of detail that we need to really understand the smartest improvement. We're forced to test, test, test and hope we're smart enough to figure out the problem and the optimal solution.
Imagine if an analytics company used the data from 1000's of clients to be able to suggest problem areas on your site. An example is if it could analyse your sign up flow and tell you if the location or color of your button or the amount of fields you had etc. was hurting your conversions and the data shows that if you made x,y and z change it would improve 20%. It would make life at a start-up a little easier and whoever creates this magical analytics company a little richer.