In the settings menu searching mouse does not bring up enable mouse sensitivity, which on face value is not super game breaking, but because this setting was reset with the 11.0 patch is caused a lot of issues as people looking to fix it could not find it. I others I know spent significant time trying to debug the issue outside of wow because the setting is hidden by a bad search box. This is the most important mouse setting in game and NEEDS to come up when you search mouse if there is going to be a search bar at all.