Hello,
first, the plugin is great! 
I started to add showing street names on roads with modyfing C++ source.
I added a new Blueprint callable function “GenerateStreetNames” which creates textrender components to the street map actor.
I can query the location of a given distance of a road, so I succeeded to show the labels.
Im using Road.MakeLocationAlongRoad for position and Road.RoadName for the name.
Where I stopped that setting the correct angle (rotation) of texts… I tried get 2 positions on road and calculating quaternon between two vectors but it doesnt give the correct result…
Any idea how to get the correct angle of roads?
I promise if it works I will commit/push if anyone need this (my final goal is getting similar result as Google Maps works, showing certain types of roads (EStreetMapRoadType) on different zoom levels.
thanks,