I did try it myself, i feel it take little bit longer or make a freeze, but othwerwise no issue
when was the last time you did deleted battle-net app cache ?
please follow this guide:
you can spice thing up with deleting in Wow.exe in World of Warcraft\_retail_ + BlizzardBrowser.exein World of Warcraft\_retail_\Utils, before you do scan&repair, to make it more “clean/new”