The addition of the minimap was a much requested featured that recently got added, which has been great. However, it does not live to its full potential exactly because of the icons themselves.
As it stands, they do not scale up proportionally. The reason the likes of I or others would like to scale up the minimap, would for it to be easier to see whats in it–and the small icons are a big reason for why.
So for the purpose of polishing this feature, please make this happen.