The maps that are played in the matchmakers are selected from pools that are setup on a monthly schedule. They are curated by the Matchmaker Team. Each queue has its individual map pool, for which the maps are selected in such a way to provide a good balance of familiarity and variation to the player. Only maps that are competitive and are considered of high quality by the team are included. In this thread the matchmaker map pools will be posted. Scroll down to see the maps that are featured in the matchmakers this month.
Keep in mind, no map pool will satisfy all players. If you have feedback on the map pools however, don’t hesitate to leave a comment in the feedback thread, linked below
https://forum.faforever.com/topic/3410/matchmaker-pool-feedback-thread/211