I brought this up before and this particular challenge suffers again from the same (design) flaws. Or put it another way: I hope that with these ideas we can improve challenges in the future.
In general I cannot be mad with what I got from the Roads Most Travelled Challenge. Mostly without needing epics I was able to progress until Round 23 of Challenge VI and claimed the epic. On the one hand it feels like it has become quite 'easy' to claim the epic, but increasingly harder to claim the 'legendary' although most of the time the epic is a really great car and key for some future events while the legendaries haven´t been very useful. Actually, that´s not even what I wanted to talk about....
To me it feels very frustrating that with challenges like in Roads Most Travelled or The Great Outdoors the car pool consists of more heavy-terrain vehicles (Offroad and All-Surface Tyres) than others which are most of the time hardly used. As most of the time these car´s cannot compete on Asphalt with Standard/Performance-Tyre Cars and vice versa, this strongly divides the strength of a garage for the event (city streets and sometimes wet twisty tracks result in the same thing, that only a few specialist cars are viable). The way these challenges are designed currently, the amount of all-terrain tracks is low and the difficulty on the all-terrain-piece seems to be quite low as well, so we can mostly beat everything with maxed SR cars. The (wet) Asphalt piece on the other hand is usually very pronounced in these challenges and often gate-keeper to progress. Of course not everyone can get every prize car always and that´s not my point. However, it feels very frustrating as with Round VI-25 this event when the epic/legendary car pool consists mostly of all-surface and offroad-tyre cars which for the most part are completely useless because tracks are all-asphalt. You can ramp up difficulty while maintaining a balance between car pool and racing tracks.