Optimizing Media Plans and Trafficking Sheets for Better Campaign Management

In many advertising agencies, managing workflow issues related to the Media Plan and Trafficking sheet is a significant challenge. There often exists a miscommunication among various teams on this front. What is the structure of your Media Plan and Trafficking sheet? How do you manage continuous changes and creative rotations during an ongoing campaign, and how do you keep track of every detail? This 'one sheet of truth' can always be improved. So, what enhancements would you suggest for your ideal Media Plan and Trafficking sheet?