I think that it would be super beneficial for more icon style options on the annotation markers as well as the ability to display the names. The maps are amazing but the business comes down to what is contained in those markers. The more i can map the better, a map with limited icon style and colors is easy to get lost in.
Additionally the ability to have annotation folders would be super helpful, exactly like google earth pro. My clients find that the initial opening of the map is a bit overwhelming with everything going on. I have attached a picture of a work around that helps a little after you minimize everything.