In Forza Horizon, i always want the add-on packs to actually be part of the world. Expanding the current map. So, it is more to explore
I know this may not be possible by the map size. But could be done with one road to the next part. Then
You get a message that you now pass into a new region of the map. Then you get a whole new map to explore. The add-on. The same when you go the other way. I feel the designs of today is just a complete separate part of the world. The Lego add-on in Forza horizon 4 was more what i think. But not actually be a new theme.