It's more than likely the most difficult churn issue you come across is a lack of or incomplete relationship. You have the wrong champion, no access to the buyer, or not enough power users. Chris Hicken of 'Nuffsaid goes over a relationship framework to help improve your champion coverage strategy.
Tech-touch customer success doesn't need to just be for companies who's customers have a low ACV. Mia Jacobs of Totango sees tech-touch solutions as a win-win for both businesses and customers. They allow for more efficient CS teams and scalable business.