I tested this track today.
Honestly, it is absolutely beautiful. Magnificent. While coherent with the theme of the underground factory.
Also, it is challenging. ^^
Still, this track suffers IMO from 3 things : -something very easy to change : the item box just before the line can be taken by the last karts at start if enough players. Since it will often give things like cake or bowling ball, and you have everyone right in front of you... This item box should be replaced or deleted.
-maybe a little bit too much nitro (at least, that can be catched by one player). Still, we'll see how 0.8.1 and future version will exactly handle nitro : my test on 0.8 may give inaccurate feeling about it.
-and the main problem, the difference between the two paths in term of time.In tests in trial, I made a 27:28 lap with the right path while using 4 zipper (I would have done around 26" without error, but nitro + zipper is so fast than not doing error appears extremely challenging). And after, I made a 23:57 lap with the left path. I'm not sure if with zippers or not, say with. We have here 10% of time less per lap when choosing the left path !
Two paths should be always nearly equivalent in term of time, accounting than IA will choose the one to take randomly and than if one is clearly better, human won't have choice if he want to guarantee the win.
Also, a little short at my taste, but this is minor and it is veryyyyyyy long in comparison to Oliver's Math Class.