"Repeating the same stupid jump 100 times and being stuck there does not exactly motivate you. For this, you'd need a different style." - Div0
Or, you could do it the old-fashioned way, which always seems to work (repetition!!!).
Example: I had trouble at first with completing cyberparcour03. However, after trying atleast 10-15 times, I WAS ABLE TO COMPLETE IT!!! I FELT SOOOOOOOOOO AWESOME!!! It was the feeling of well-earned success. Failure and willpower compelled me to complete it, and I did!
Also, I like how you say the maps are unbeatable when clearly several players have beat them.
"Iirc Race was a substitution for the Flag runs on CTF servers where the sole goal had become to make the fastest cap on a map and it was detrimental to the gameplay." - PinkRobot
Well, CTF maps had obstacles too

. Plus, CTF evolved as gameplay (although it still keeps the basic concept), why can't race?
And yeah, I like your idea of a new mode, with the concept of CTS but not called CTS (the name is....yeah not exactly the best for the younger players, even though this is the internet.)