The other two long point-to-point tracks are an absolute blast to drive as well - both measuring about 6-9 minute runs depending on cars. One is the French coast, and one is California Highway. People are clamoring for more of them too. So lots of options from go-kart tracks, to the nurburgring, to ovals for NASCAR, road runs, and normal circuits.
Not to mention they already have several great tracks you don't see in most other games, like Bathurst etc.