We've been tracking an issue in the WoW Forever Beta where the 0.5-second cast time that precedes a Hunter's auto-shot or the use of a wand is not functioning properly.
Due to a bug, these auto-shots are currently incurring a much shorter cast time, which in practice means that Hunters and wand users don't need to stop to shoot for as long as intended.
This is something that we will fix in an upcoming Beta build, hopefully next week.