Letter looks good. If you want to add more to it I would include all or some of the following.
The CEO is responsible to run the company.
The board of directors work for the shareholders. They have a fiduciary duty to ensure conduct and management of its affairs are in-line and the CEO and management within the company have a vision for the company...for years to come. By being on the Board Of Directors they are putting their personal assets on the table and the corporate veil can be pierced if they fail to do their fiduciary duty and especially if involved in a scam.