Good for him. What is the difference between a coordinator and a director in this context?
The typical hierarchy of position titles in baseball ops departments is something like this:
General Manager
Assistant General Manager
Director
Assistant Director
Coordinator
Assistant
Intern
The GM and AGM are typically in charge of all areas of baseball ops. Then each functional area is usually headed by a director. These will typically include such areas as player development (also sometimes called minor league operations, or the director may be called the farm director), baseball ops (which is usually major league operations), pro scouting (major leagues, minor leagues), amateur scouting (college, high school), and international scouting. Other responsibilities like video, advance scouting, analytics, or medical may be folded into one of the previously listed functional areas, or they may be split out in their own area with a director or coordinator in charge. A coordinator is usually someone who is in charge of a smaller functional area, or assisting a director with a larger area but in a more administrative role. For example, a scouting coordinator would often be the person who is assisting the scouts with setting their travel, helping them with expense reports, making sure they file their scouting reports, etc. Whereas the director of scouting would typically be a person who defines the strategy for the scouting group, hires the scouts, and assigns their areas. Obviously, not every team follows the same exact set of titles and responsibilities, but that's a general guideline for interpreting baseball ops titles across the industry.
Some teams will have a Manager level that, depending on how they use it, could either be similar to a Coordinator or between Director and Coordinator.
Kevin as coordinator was already responsible for the whole pro scouting function for the Astros, so it's not like he is replacing someone else in the Director role now.