Erm, have you even tried playing on them? They're too large. (150x150) They take forever for the client to load, and huge.tmx is really laggy. The game isn't optimized to be able to render 400+ tiles of Forest, and 20,000 tiles of shrubs and glowing fungus. Even though you've only just over doubled the length and height dimensions of the map, the area, and thus load, has increased by sixfold.
Consider the normal map size is ~3500 tiles. (65x55 or 50x70) I know it feels cool to make a massive map, but with all things, quality over quantity. If you want a map where it takes longer to reach the robo, place a lot of impassable terrain.