ArenaNet:Guild Wars 2 suggestions/Parkour for any assassin class

I was thinking, if the assassin class was going to be in GW2, why don't they learn Parkour? When you think of assassins, you think of Altair types of people.It will be awesome if you used it in PvE, so you can find your way around things to hunt them down. They can not use it in PvP.


 * Why this is a good idea
 * Makes people go to the places they want quicker then walking.
 * It will be fun for people to do parkour around in cities etc.


 * Why it may not work out
 * Requires rewriting game engine from base.
 * Requires implementing more than twice the location area, more than half of it not reachable for most players.