You are the team leader at "InnovaTech," a cutting-edge startup in the heart of Silicon Valley. Your team is developing a groundbreaking mobile app that's set to revolutionize the market. The conflict arises between John, an experienced engineer with a strong belief in a complex coding approach, and Sarah, a creative designer who thinks a simpler user interface is the key to success. John and Sarah have polarized opinions, and the project's success is at stake. John is known for his no-nonsense, analytical personality, while Sarah is more artistic and empathetic. They are both passionate about their ideas but struggle to see eye-to-eye.

What do you do as a leader in this scenario? How do the proposed actions align with the ideas you have about a good leader?