Ahh, parkour.
A lovely gamode where you can chill a bit from the competitive cubecraft community.
Although I support the idea with two hands, sadly I know that it's not going to happpen any soon.
Parkour is pretty much the least played non-featured gamode on the network, and since it hasn't receive updates in about 2 years, it obviously isn't a priority.
I'm sorry for repeating this over and over when people suggest updates for other gamodes than Skyblock and Eggwars, but it's pretty much the truth.
Parkour is fun, and unique, and it definitely deserves to be updated, but sadly I doubt, that there is any development time resource left for it.