A new update to Civilization 6 will help rebalance the game in light of the new leaders added from the various Frontier Pass content updates. It will also add three more new units, two more True Start maps, and updates to naval battle AI.
According to Firaxis, the update will tweak some existing Civilizations in response to player feedback, in an effort to make them more competitive with the new leaders. Those balance changes will include Spain, Khmer, China, Mapuche, Canada, and Georgia, among others.
The update will also add the Line Infantry, Man-At-Arms, and Trebuchet units. Since those units will change the pacing, Firaxis is also making several other unit changes. That aims to make sure the new units feel weighty and smooth out combat differences. A new True Start Mediterranean and True Start Huge map will be part of the update as well, and the AI will make better use of naval units and choices around naval production.
This will be the last of the updates planned as part of the Frontier Pass roadmap. While the Frontier Pass is a premium expansion, the overall game balance updates like this one are free for all players. If you do want to get in on the Frontier Pass, you can purchase individual parts a la carte for $9, or the full bundle for $40.