These are honestly kinda just okay in my opinion. They function, except at times in anchorhead cup where some collision bug put me at the top of a building or over a wall which i cant replicate constantly and haven't been able to save a clip of. Visually they could use some more detail, especially in anchorhead cup.
That being said, the idea behind the cups are genuinely really cool to me, having the maps take place in the same area but each map has you on a different part of that area is really cool, but then you run into the issue that you're kinda just playing much of the same map over and over, which kinda takes away alot of the enjoyment of it, due in part with how the idea kinda limits what you're able to get away with. The second cup starting you off at the same area every single time only makes the issue worse. It also kinda makes it hard to evaluate these maps by themselves.
The special stage being replaced with a duel race is again, a really cool idea, but you can give yourself such a big head start that it's kinda just impossible to lose? I played these maps in master mode grand prix and the duel races are really easy to complete, which was sorta disappointing considering that bots are really damn tough in master mode, like almost to an unfair degree.
If the maps didn't feel so repetitive playing through grand prix i think i would rate this higher than "okay", despite being onboard with the concept. Still look forward to what else you may be making in the future.