Love the snow effect you added

 

I see nothing game-breaking about this map. However, I do see a few things which will ultimately lead to sub-optimal gameplay interactions. This map is reliant on long, straight lines of sight laid out at 90 degree angles and broken up by small pieces of cover. The nature of these lines being exclusively parallel or perpendicular to one another and being segmented by small pieces of what is typically refereed to as lazy cover is that they will lead to predictable and repetitive engagements. Players will strafe behind pillars and dance around them during engagements, but there is little height variation or multi-purpose geometry to create more dynamic, nuanced, engagements. I speak mainly of the bottom middle area (particularly the geometry shown in your fourth screenshot), but there are other stale lines of sight throughout the level due to its simple angular geometry. This is partially brought about by the map's layout being merely an elongated rectangle. Try experimenting with different angles, subtle height variation, and non-perpendicular intersecting lines of sight to promote deeper engagements.