While still as fun to drive in as any additional map would be, I feel there is something missing to really complete the package, and it would mostly be more LEGO.
Not every new car is LEGO, they already add very few new cars with each expansion, and even unlocking some of the few choices requires playing a lot of the expansion, which limits your possibilities if you just want play with LEGO cars.
In general the map and races feel uninspired (a lot of mirror A to B, B to A races), and collectables that appear only at night or when raining AND are only unlocked deep into the expansion make for an uneven experience, that is still good, but could be much better.
Not every new car is LEGO, they already add very few new cars with each expansion, and even unlocking some of the few choices requires playing a lot of the expansion, which limits your possibilities if you just want play with LEGO cars.
In general the map and races feel uninspired (a lot of mirror A to B, B to A races), and collectables that appear only at night or when raining AND are only unlocked deep into the expansion make for an uneven experience, that is still good, but could be much better.