The document discusses how to overhaul a design without upsetting users. It recommends: 1. Making changes based on evidence from user research like metrics, feedback and competitive analysis. 2. Having an ongoing user-centered design process in place to continuously collect the right evidence. 3. Deciding if a redesign is truly needed by determining the size of any issues and what may be gained or lost. 4. Redesigning with the right expertise, using additional strategy, research, testing and simplification. 5. Being prepared for potential backlash by having a communication plan, considering power users, and providing training.