I feel this area is lacking in zwift;
While everyone in a virtual world to go at a constant intensity and not worry about turns as the game handles that for you. In a real world you have to slow down or brake before a turn. Why not identify key turns where a rider must target a specific wattage/kg where they either get a time/speed boost if they hit the wattage/kg correctly if they dont they get a time/speed penalty.
This could be for like hairpain turns, and turns where it is less than 90degress.
Experience could also be gained for every perfectly timed turn