Interesting to see the conclusions that Blooze and Serial are coming to regarding two sets of tracks vs. 3. Interesting why?
Well, with running the random cars, it is beginning to seem to me that the edges of the Flowing tracks are getting blurred. For example, with the R-Class Audi and Ferrari, I ended up only running 2 basic tunes, which meant that the Flowing tracks effectively got lumped in with the Twisty tracks. A similar thing happened with that '07 Civic which had so little in the way of upgrades. And then again with the Trans Am which added tyre width rather than power for both the grip and flowing tunes. The only one which ended up with a different set of builds so far is the Infiniti, and that was hardly a roaring success in the Flowing Tracks.
In short, I was headed along the same thought process as yourselves, only with not as much data. I'm not thinking along the lines of there still being 3 types of track. Power Tracks and Grip Tracks obviously would require a grip or power build respectively. But, for the flowing tracks, I think it may be a case of applying grip or power parts to make up for the inherent deficiencies in the basic car, at least in the early stages. I think you guys are onto something here.