the tool tips do not scale properly using the UI. You gotta press ctrl - u twice to reload the UI. After this the tool tip UIs match the global UI settings properly. The only major issue with scaling is the map sizing. The map size appears to be hard coded for standard UI scaling. If you increase your screen scale the map and secondary UI elements will become too large to fit on the screen. So for people trying to play on a TV it is possible to get everything looking ok but then the map and some secondary UI panels no longer fit on the screen and are two large. Looks like this problem has existed since the scaling UI came out. So not sure they will ever fix it.