In 1.9, wall walking was disabled.
In 1.12.1, wall jumping was disabled.
2.0.1, both wall-climbing abilities are now working.
About a month left until the release of The Burning Crusade. Is there anything left to explore in Azeroth? If it is, im sure it will be alot easier to discover with the ability of wall walk and wall jump. Take this knowledge, go out in Azeroth and explore.