This track is pretty solid, it reminds me a lot of Fundidora Park, in Mexico. The major drawbacks are that this track only holds 32 cars, instead of 47, and the cameras. There's a few other minor things that bug me, like the reflection maps, which can be fixed in like 5 seconds, and the AI spinning off the course at turn 4 (the easternmost corner on the track), but that could very well be because my papy_ai.ini file is configured substantially different from the default.
All of the above are things I'd be willing to fix if I get the chance to, and, outside of the pit lane capacity, could probably be done relatively quickly, too.
Definitely give this track a download, it's a keeper for sure, and it's your best work to date.