This suggestion is for both multiplayer and single. After going through the route in single with the dragon, I have seen details along the route that I have not liked and I explain why:
1- the vegetation is excessively repetitive, I don't know that country, and it may be a country or the area represented with a lot of vegetation, but the vegetation that we find is 3 types of trees, 3 types of shrubs, wheat, and one species yellow blooming set that basically boils down to a single preset shape that reminds me of some very basic low quality vegetation that Train simulator had. 1 type of flower. And three deer seen at the end of that path. The cars have no variety and are translated into three colors, red, blue, and white. Two types of trucks.
2- Cities and especially smaller populations do not take care of the most basic details. It seems as if there are no lawn mowers, all the house grounds are flooded with vegetation, for example. In what are supposed to be recreational parks, just a kind of booth that is repeated in various parts of the town. Please, even if it is a train simulator, at least the crossing points and the closest areas have a little more love and better represent the closest environment, because it seems that everything that comes out has been thrown away.
There are level crossings that the vehicles cross without stopping, getting to cross the train. Vehicles that approach the level crossing and arrive at high speed and stop suddenly without a minimum smoothness.
I do not want to extend much more, but please a little more love and creativity when representing the nearby landscapes. Take it as a constructive criticism that will help improve the simulator in that sense. regards