As a fan of the series, I think you should keep it for later especially if you plan to play through sky and the start of the cold steel arc. Some of Kiseki's strength's are it's worldbuilding, and storytelling in terms of politics and how it's reflected through various events. In my opinion, the anime currently seems to be struggling on how to tell it's story, losing value from newcomers who don't know much about the world, and playing the games would make you understand and feel the importance of the Northern Jaegers and the situation of the various parties at play.

HI!