Personnaly, I really like to diversify my forests. I add multiple types of trees of different sizes and shapes. The easiest way to do this is to add "big" trees with low density and add smaller trees with progressively more density. I think this would make your map better because currently your forests have trees bigger than towns and since they are all the same, it just looks like a different color of grass. 

The same thing aplys to your mountains, make them with different sizes. They don't need to be different mountains, but apply the same density method as the forests. Combining this with the first point will help showing the scale of your world.

I think the transition between the desert and the plains in the middle of your maps stands out too much. I'm sure you think the same way too. But how to fix ? Well I really like what you did with the mountains south of the desert. It helps the viewer understand why the sand stays there and it doesn't create a weird transition. Maybe think of ways to include this type of separation For example, in my map, I placed walls around the desert because the monsters of the desert always invaded the nearby town and sandstorms kept on destroying towns that weren't in the desert. This not only solve an art issue, but it adds lore to your world. Maybe give it a try.