This is a guide to what I do when I need to reinstal worldofwarcraft but want to play the same day, not wait for patching.
Requirements: The most uptodate PTR client downloaded, World of Warcraft, and a computer
Step One: Download PTR Client
Step Two: Select world of warcraft and uninstall
Step Three: Reinstall World Of Warcraft
Step Four: Once patching, your patch should go as if it was still there
Step Five: Have fun playing on WoW
(Off Topic Question: Why do my other posts keep dissappearing?)