What new maps have been added to the game recently and how have they changed the dynamics of matches?

The latest map added to the ranked pool is Abyss. It is unique in that it has no artificial boundaries, and a large part of the map is a deadly chasm. However, long-range firefights are possible. Abyss has certainly added openness to matches but also increased the demand for strategic planning.
You can see the details of this map in this video: https://www.youtube.com/watch?v=Oj9uHtMTn4k