Ah I didnt know u couldnt get 5x5 anymore when u are 1700+. I dislike that tbh. A high level player is supposed to be proficient at all the different sizes of map. Also u have practiced these 5x5 maps the past time climbing the ladder, and now suddenly u dont need to play them anymore (atleast in mapgen)? That seems odd to me. Lastly, the fact that it says 20x20 at the top right of ur screen when playing on a 15x15 map is confusing. It would be nice if there was some clear indicator of the size of the map (although Im sure there is but im too dumb to find it).
Other than that I really enjoy the current format on ladder with mapgen. The maps it creates are really good and a welcome variety